Extrinsic 41251-1

{
  "heartbeat": {
    "blockNumber": 41250,
    "sessionIndex": 687,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x644e6c1333bccc2f501006fbc23ab95fba2cf317d9c0ed696b257d1ca4994f3be5524144e3901c457222bbf1200402371ee7fc55c69e8ede7fecd38a7492778e"
}