Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAABAwE4ZWVtw/FbMdQfCQTzHvfLM1eXC9qG7hJgNfJjE8dEIw3D14FhvkXuydP/… (844 chars)"
  }
}