Extrinsic 9578-1

{
  "heartbeat": {
    "blockNumber": 9576,
    "sessionIndex": 159,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xa4c2b8768f79d7ed0fb1af50a9ac4605fd141538e8e9e58b722bf0096b88c052398408fb0819c61f3688cd62551ec4bd7e11242d019c53bdcd9c30925ab7848f"
}