diff --git a/src/ripple/rpc/impl/TransactionSign.cpp b/src/ripple/rpc/impl/TransactionSign.cpp
index db799ea8a..50424af84 100644
--- a/src/ripple/rpc/impl/TransactionSign.cpp
+++ b/src/ripple/rpc/impl/TransactionSign.cpp
@@ -989,44 +989,35 @@ Json::Value transactionSubmitMultiSigned (
         }
     }
 
-    // Check Signers for valid entries.
-    STArray signers;
-    {
-        // Verify that the Signers field is present and an array.
-        char const* signersArrayName {sfSigners.getJsonName ().c_str ()};
-        if (! jvRequest.isMember (signersArrayName))
-            return RPC::missing_field_error (signersArrayName);
+    // Verify that the Signers field is present.
+    if (! stpTrans->isFieldPresent (sfSigners))
+        return RPC::missing_field_error ("tx_json.Signers");
 
-        Json::Value& signersValue (
-            jvRequest [signersArrayName]);
-
-        if (! signersValue.isArray ())
-        {
-            std::ostringstream err;
-            err << "Expected "
-                << signersArrayName << " to be an array.";
-            return RPC::make_param_error (err.str ());
-        }
-
-        // Convert signers into SerializedTypes.
-        STParsedJSONArray parsedSigners (signersArrayName, signersValue);
-
-        if (!parsedSigners.array)
-        {
-            Json::Value jvResult;
-            jvResult ["error"] = parsedSigners.error ["error"];
-            jvResult ["error_code"] = parsedSigners.error ["error_code"];
-            jvResult ["error_message"] = parsedSigners.error ["error_message"];
-            return jvResult;
-        }
-        signers = std::move (parsedSigners.array.get());
-    }
+    // If the Signers field is present the SField guarantees it to be an array.
+    // Get a reference to the Signers array so we can verify and sort it.
+    auto& signers = stpTrans->peekFieldArray (sfSigners);
 
     if (signers.empty ())
-        return RPC::make_param_error ("Signers array may not be empty.");
+        return RPC::make_param_error("tx_json.Signers array may not be empty.");
+
+    // the Signers array may only contain Signer objects.
+    if (std::find_if_not(signers.begin(), signers.end(), [](STObject const& obj)
+        {
+            return (
+                // A Signer object always contains these fields and no others.
+                obj.isFieldPresent (sfAccount) &&
+                obj.isFieldPresent (sfSigningPubKey) &&
+                obj.isFieldPresent (sfTxnSignature) &&
+                obj.getCount() == 3);
+        }) != signers.end())
+    {
+        return RPC::make_param_error (
+            "Signers array may only contain Signer entries.");
+    }
 
     // Signers must be sorted by Account.
-    signers.sort ([] (STObject const& a, STObject const& b)
+    std::sort (signers.begin(), signers.end(),
+        [](STObject const& a, STObject const& b)
     {
         return (a.getAccountID (sfAccount) < b.getAccountID (sfAccount));
     });
@@ -1061,9 +1052,6 @@ Json::Value transactionSubmitMultiSigned (
         return RPC::make_param_error(err.str ());
     }
 
-    // Insert signers into the transaction.
-    stpTrans->setFieldArray (sfSigners, std::move(signers));
-
     // Make sure the SerializedTransaction makes a legitimate Transaction.
     std::pair <Json::Value, Transaction::pointer> txn =
         transactionConstructImpl (stpTrans, app);
diff --git a/src/ripple/rpc/tests/JSONRPC.test.cpp b/src/ripple/rpc/tests/JSONRPC.test.cpp
index a2a8b0a31..fc5fe923f 100644
--- a/src/ripple/rpc/tests/JSONRPC.test.cpp
+++ b/src/ripple/rpc/tests/JSONRPC.test.cpp
@@ -665,7 +665,7 @@ R"({
 "Secret does not match account.",
 "Secret does not match account.",
 "",
-"Missing field 'Signers'."}},
+"Missing field 'tx_json.Signers'."}},
 
 { "Missing 'Account' in sign_for.",
 R"({
@@ -831,21 +831,21 @@ R"({
 { "Minimal submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -878,20 +878,20 @@ R"({
 { "Missing sequence in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -905,20 +905,20 @@ R"({
 { "Missing SigningPubKey in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "Sequence": 0,
         "TransactionType": "Payment"
     }
@@ -932,21 +932,21 @@ R"({
 { "Non-empty SigningPubKey in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8",
         "TransactionType": "Payment"
     }
@@ -960,20 +960,20 @@ R"({
 { "Missing TransactionType in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "Sequence": 0,
         "SigningPubKey": "",
     }
@@ -987,20 +987,20 @@ R"({
 { "Missing Account in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1014,21 +1014,21 @@ R"({
 { "Malformed Account in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "NotAnAccount",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1042,21 +1042,21 @@ R"({
 { "Account not in ledger in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rDg53Haik2475DJx8bjMDSDPj4VX7htaMd",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1070,20 +1070,20 @@ R"({
 { "Missing Fee in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1097,21 +1097,21 @@ R"({
 { "Non-numeric Fee in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50.1,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1125,20 +1125,20 @@ R"({
 { "Missing Amount in submit_multisigned Payment.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50000000,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1152,21 +1152,21 @@ R"({
 { "Invalid Amount in submit_multisigned Payment.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "NotANumber",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1181,21 +1181,21 @@ R"({
 R"({
     "command": "submit_multisigned",
     "build_path": 1,
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1209,20 +1209,20 @@ R"({
 { "Missing Destination in submit_multisigned Payment.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1236,21 +1236,21 @@ R"({
 { "Malformed Destination in submit_multisigned Payment.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "NotADestination",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1278,22 +1278,22 @@ R"({
 "Missing field 'secret'.",
 "Missing field 'secret'.",
 "Missing field 'account'.",
-"Missing field 'Signers'."}},
+"Missing field 'tx_json.Signers'."}},
 
 { "Signers not an array in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": {
-        "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-        "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-        "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-    },
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": {
+            "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+            "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+            "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+        },
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1302,19 +1302,19 @@ R"({
 "Missing field 'secret'.",
 "Missing field 'secret'.",
 "Missing field 'account'.",
-"Expected Signers to be an array."}},
+"Field 'tx_json.Signers' is not a JSON array."}},
 
 { "Empty Signers array in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1323,33 +1323,33 @@ R"({
 "Missing field 'secret'.",
 "Missing field 'secret'.",
 "Missing field 'account'.",
-"Signers array may not be empty."}},
+"tx_json.Signers array may not be empty."}},
 
 { "Duplicate Signer in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        },
-        {
-            "Signer": {
-                "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            },
+            {
+                "Signer": {
+                    "Account": "rPcNzota6B8YBokhYtcTNqQVCngtbnWfux",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }
@@ -1363,21 +1363,21 @@ R"({
 { "Signer is tx_json Account in submit_multisigned.",
 R"({
     "command": "submit_multisigned",
-    "Signers": [
-        {
-            "Signer": {
-                "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
-                "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
-                "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
-            }
-        }
-    ],
     "tx_json": {
         "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
         "Amount": "1000000000",
         "Destination": "rnUy2SHTrB9DubsPmkJZUXTf5FcNDGrYEA",
         "Fee": 50,
         "Sequence": 0,
+        "Signers": [
+            {
+                "Signer": {
+                    "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
+                    "TxnSignature": "3045022100F9ED357606932697A4FAB2BE7F222C21DD93CA4CFDD90357AADD07465E8457D6022038173193E3DFFFB5D78DD738CC0905395F885DA65B98FDB9793901FE3FD26ECE",
+                    "SigningPubKey": "02FE36A690D6973D55F88553F5D2C4202DE75F2CF8A6D0E17C70AC223F044501F8"
+                }
+            }
+        ],
         "SigningPubKey": "",
         "TransactionType": "Payment"
     }