Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwFsPVeWv6pEJJ0scy8zO4TZ9zI6b9xRvW8+pv3EZj70gGs9zzrPg+4b1pNA… (844 chars)"
  }
}