Extrinsic 177969-1

{
  "heartbeat": {
    "blockNumber": 177968,
    "sessionIndex": 2966,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xc2d7709219bc17c14ae29d159ad1b218e625ea4624e068804368aa7835f732627b977e19a833993d2d5fbf598f30bb28a62afbbe872ee4fd2fb061870eb74787"
}