Merge pull request #414 from BitGo/update-bitgo-api-docs

Update API reference on BitGo Developer Portal

Author: dev-portal-updater-protected[bot]

api.yaml

@@ -63313,6 +63313,7 @@ components:
         - timestamp
         - feeString
         - payload
+        - signature
       properties:
         coin:
           type: string
@@ -63360,7 +63361,6 @@ components:
           description: Raw JSON payload string representing the unsigned transaction data
         signature:
           type: string
-          nullable: true
           description: Signature of the payload
     HashStakingRequest:
       title: HASH