Extrinsic 19365-1

{
  "heartbeat": {
    "blockNumber": 19363,
    "sessionIndex": 322,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x8e98f339f29a39d632f998d45f049a7e8cad6f459d34c55b9ec46f38acfe6411897ec9dc5ee383ca41a3da88245fcbc592442a9f6e30a27ab13b480f9e5e6984"
}