Extrinsic 19662-1

{
  "heartbeat": {
    "blockNumber": 19660,
    "sessionIndex": 327,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xd45fd9ab296b835bf6bf8a236477a90bd87356912891fd44831b55078612b52cb15e67afc77028720c945179e1816a7709afa7b62ea33c437e1e98c4014d2888"
}