Extrinsic 34356-1

{
  "heartbeat": {
    "blockNumber": 34355,
    "sessionIndex": 572,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x4e4248d1d23c464eb3a9904ca85c0f838acb042063ffebd57408d17e1704cc03ec76bfeb7204383e902ca13bebf11045f52d9f31fe354b3837e2a6b4866af58b"
}