Extrinsic 16054-1

{
  "heartbeat": {
    "blockNumber": 16053,
    "sessionIndex": 267,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x90df569feb5031a5422fa37bf2178da7a99ee4165468f98d3aa6a7b4b15ee9447f0f36f98711ce46875af0e6c340dce9e97edbf1bfa6ef65ae52ff754ed2738d"
}