Extrinsic 17681-1

{
  "heartbeat": {
    "blockNumber": 17679,
    "sessionIndex": 294,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6648c741a4d611526d4fa0e6f7e40d9a9226ae559f9bb11662e76bd30a8e9b26cb7e8dfa82d6c3b0920d1a0fb8eff0142a7b61a3593deb8ddffe6cbb96edd584"
}