Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwE1R5k8JM6aLQomBGS5Yq8AGJBC12SvAVt5/gYq8Wqstm5H5os9B3hfjLF4… (844 chars)"
  }
}