Extrinsic 3582-1

{
  "heartbeat": {
    "blockNumber": 3581,
    "sessionIndex": 59,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa2f3eca97a1782c6f2b37c1b08296fc04bcf5244b84cbff0ee86b5e5bd048138e65e2145c7f9c0f7b3fbb5c9194701725301327ef38069ea62351a476a27f18a"
}