Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAABAwE3+mYS1npvb5/j9UTdTK5R5FZe9SwuRgcRsIW4l7iaMD5+8Lqa6GE6zOdf… (844 chars)"
  }
}