Extrinsic 41021-1

{
  "heartbeat": {
    "blockNumber": 41019,
    "sessionIndex": 683,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x54da841acbb383670966baa7863f60dca536e23bd849f0fba31ab686c881da1eea71000da19639512dcd5257b614ddf3503c20179468bcd5b04043185b033386"
}