Extrinsic 19960-1

{
  "heartbeat": {
    "blockNumber": 19959,
    "sessionIndex": 332,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x389423bf105a6f894d0185e9caf23ddb8d27449911521ff2ed8478bf530213175780eb2b8fa2fbc126faaac901af2bd4495e9b05a5b77eac4e883a79d9115585"
}