Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwFgb7KMVEWdIwCvwjp8zpOqAtlsEcruQoeGqVUAT4/+wCRiD8B87a/Gv6HB… (844 chars)"
  }
}