Extrinsic 53318-1

{
  "heartbeat": {
    "blockNumber": 53317,
    "sessionIndex": 888,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc06a336e6173bc16e996493d34e20078e139a2d477333a81852cfa65b222442633a08cfba44ec6860238b2ca79fe6f9eb28ac672fab6442e543608afc94b0d81"
}