Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwEm7tWZpO1WEGOTpYRbwkU/jCqOc2+3f2LTOzPuxt1470EXn5g8G0nT5v82… (844 chars)"
  }
}