Extrinsic 17910-1

{
  "heartbeat": {
    "blockNumber": 17908,
    "sessionIndex": 298,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x56cdbb94f4e48054b9911bc29a982b56d171effa59645333d6a2aacb46778540c3446d2c70eb608168732429725fe61e566059baca29b3f37e0f1ff30c7f4d8a"
}