Extrinsic 18048-1

{
  "heartbeat": {
    "blockNumber": 18047,
    "sessionIndex": 300,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x5eff36447fbb69d44a09a843ba2eab6420e41dfaa2b4e022ab67ec4c69defe4f02759f4334cd2aada700368d24f22b10d7eebbb13f45d5ec6118d1d264af5d8f"
}