Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwA78Fl/vNjF2ZpaEHGtQkhaALHBSAvh1Fvlnx7vI0nDEC4AmK8wnrDCu4Vz… (844 chars)"
  }
}