Extrinsic 43542-1

{
  "heartbeat": {
    "blockNumber": 43541,
    "sessionIndex": 725,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x76b2e8e9d95526fed14136e132926b8ab938d7e6af9dd812f7ca81518bd5ab7e763d0eff82cb4aebab015e8320e222bc0aa79869d7dafb0718c3cfb695e0038c"
}