Extrinsic 17741-1

{
  "heartbeat": {
    "blockNumber": 17739,
    "sessionIndex": 295,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x2e67b35caa237ea64d51b0192133c975cc3000d48750c04de712a788289c1d087f3bcd0f56d95d5e9f04e16945e51beddefbce3a71d320ae7712203d95bb448a"
}