Extrinsic 71538-1

{
  "heartbeat": {
    "blockNumber": 71537,
    "sessionIndex": 1192,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb49caf890a6c7b18369892ca9f378a8c7175840fb20f373668c150fecb40ba02f543f5dbe3b79bf0423af2790e069a6c0b76bbf05e5016ae02e6259dc6dd8583"
}