Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwA2jk+QpJpo5yRWKLd4VWA86WOcvW9CQvyMBNiafVSNUzWuZxej1q2jQ2P/… (844 chars)"
  }
}