Extrinsic 60288-1

{
  "heartbeat": {
    "blockNumber": 60287,
    "sessionIndex": 1004,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8c198af8d56d8c0664a320fe068828e188e9f4a479313858d3103866103c633a7df8994553f3311e68ff535f029c2505aef56dc16a45a7d8b3fad91a93880885"
}