Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwFMUwNRz5nuBE+s5FaNYGUW/Lk+yoKxhWaBvHLExEO8rgHPCNkQD0Ee4Yw9… (844 chars)"
  }
}