Extrinsic 4583-1

{
  "heartbeat": {
    "blockNumber": 4580,
    "sessionIndex": 76,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xd8c9d94a0a20c6005a830d5756aa8b8d52b7a3ed5e1d50a2e73f8daf59c2286b6991bbcd27e727ae465b35d1e21aedd2ea21a88eef28088897f0c13c7773768a"
}