Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwGTp/4jdTy/W3e5OYf3HwdZGHsUWK/gJlTnYv9AfRzBHAcyC9G5LV67acSJ… (844 chars)"
  }
}