Extrinsic 18168-1

{
  "heartbeat": {
    "blockNumber": 18167,
    "sessionIndex": 302,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x7a2e8de032f3ff00d0d5ace469ce79845aa06d9140a7da1e86fa094f6b26231bd38cc14637e249ba3277dcf1dc6b0aac0e2b41404bc26a08b3e9b73027b4c780"
}