Extrinsic 398905-1

{
  "heartbeat": {
    "blockNumber": 398904,
    "sessionIndex": 6648,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xe26dbf921ce2b69bf1ea34f48f8e518aebdf520f3bdbf3ab08b66ef652c6726b0939bda0eafd50e6c2813a310dba261b12255961e33f8b05e8963f7a3dfe348d"
}