Add valid MPT Issuance sample

docs/concepts/tokens/fungible-tokens/multi-purpose-tokens.md

@@ -25,7 +25,7 @@ MPTs let you take advantage of ready-to-use tokenization features with a few lin
     - The issuer can configure MPTs that can be clawed back from tokenholder wallets, either to revoke them, or to reassign them in the case of lost wallet keys. 
     - An opt-in feature can allow only wallets authorized by the issuer to hold issued tokens.
 
-## MPTs vs Trust Lines
+## MPTs versus Trust Lines
 
 Unlike trust lines, MPTs do not represent bidirectional debt relationships. Instead, MPTs function more like a unidirectional trust line with only one balance. This reduces the overhead to support common tokenization requirements, including non-monetary use cases such as tracking reputation points in an online game.
 

docs/references/protocol/data-types/mptokenissuance.md

@@ -15,15 +15,19 @@ The `MPTokenIssuance` object represents a single MPT issuance and holds data ass
 
 ```json
 {
-    "LedgerEntryType": "MPTokenIssuance",
-    "Flags": 131072,
-    "Issuer": "rsA2LpzuawewSBQXkiju3YQTMzW13pAAdW",
-    "AssetScale": 2,
-    "MaximumAmount": "100000000",
-    "OutstandingAmount": "100",
-    "TransferFee": 50000,     
-    "MPTokenMetadata": "",
-    "OwnerNode": "74"
+  "name": "US Treasury Bill Token",
+  "symbol": "USTBT",
+  "issuer": "US Treasury",
+  "issueDate": "2024-03-25",
+  "maturityDate": "2025-03-25",
+  "faceValue": 1000,
+  "interestRate": 2.5,
+  "interestFrequency": "Quarterly",
+  "collateral": "US Government",
+  "jurisdiction": "United States",
+  "regulatoryCompliance": "SEC Regulations",
+  "securityType": "Treasury Bill",
+  "external_url": "https://example.com/t-bill-token-metadata.json"
 }
 ```