Extrinsic 18934-1

{
  "heartbeat": {
    "blockNumber": 18932,
    "sessionIndex": 315,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xf68fc6253e48529ee41c8be83a6d158a7a6eee00bdb6826b7762e41798d81d6e9a58d0f8cd711b1acf5312f863e55465bb56b7018c7a9e94787919671ed8e88d"
}