Extrinsic 19533-1

{
  "heartbeat": {
    "blockNumber": 19531,
    "sessionIndex": 325,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x4e8518a14d08b22c94e9394afb3a4361e6385a6615d14bded034638301c5fb198948859c872f9fb269dd7abfee650e350a94555dc24b841dabb9e2bfa173c085"
}