Extrinsic 5255-1

{
  "heartbeat": {
    "blockNumber": 5253,
    "sessionIndex": 87,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xb6022f4e0b9646cdb0bd099fd1157bff2eebd810f62224b8e9a279732fe1fb3b9ab200ad475a806eb02fd3a58fac30aba70d2dd7e293c235b01100324e410684"
}