Transaction

{
  "update_price_feed": {
    "vaa": "UE5BVQEAAAABJAEAAAAAAwHzIvzIzvUQyGSRCiMeUgqIjr/BpE0VFBZ2zIvbvq03FWP3+NMKHD/D0Hep… (844 chars)"
  }
}