Extrinsic 16747-1

{
  "heartbeat": {
    "blockNumber": 16746,
    "sessionIndex": 279,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xc0e5c1dfda5248ce02b8b5e85594e7f2fefe901b6a9ccca639125900feb99917e27ecd811f69572d7efaa1cfc7e86d79ec36b8793981a3697a8a21eeaa9ac982"
}