Extrinsic 4303-1

{
  "heartbeat": {
    "blockNumber": 4301,
    "sessionIndex": 71,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xd8a3244f80fd49ee5a6cfdda07bf3c73c2c64f636ac86365ad4479e3bec70c0a85f7d0fde7bbd725b7dc35627ae5a7b53e896eef5bf4e68220c2228b76e0748a"
}