Extrinsic 4064-1

{
  "heartbeat": {
    "blockNumber": 4062,
    "sessionIndex": 67,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xc8e31efa1099b34b530ba5e213c7f59373cd16ae5d2b178ae2eaa512d0d5b0096604bbbb4afa96a67b87ce5c284927a98470a1ce0d64c3c4e7009f68d549e086"
}