Extrinsic 17559-1

{
  "heartbeat": {
    "blockNumber": 17557,
    "sessionIndex": 292,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x5043b98ae41dc5b4f4f5a3d0de3c83397df59f920ca7653973c05a5462d9984d2b0c03fea52930c1b890a7c762110efbb4009cf90b6b773fda1bc98bd55aff83"
}