Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAABAwGSU4tTPUoBSA/WFOz5X9cEESGnSErkOW+m6u8XGIoIM1Jwtd6MkVBE8Zfe… (844 chars)"
  }
}