Extrinsic 177325-1

{
  "heartbeat": {
    "blockNumber": 177324,
    "sessionIndex": 2955,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xa204c58555da0d53360922893ecf8d81a8ee76d85a19b1d2608f7e1f0276aa26a4237701026f535eeff70a8ba70bf48b7c587e650190ba47eb012e8768f1e484"
}