Extrinsic 3741-1

{
  "heartbeat": {
    "blockNumber": 3740,
    "sessionIndex": 62,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xa6a092fc1e0ba07c56fd9fa7dcf47b460c5cc7958e19e7bf874bff9c8cb6d46689cda37a97cba17457ba2e7200e40bf82e2bb4f961eaddf023aaeddb82851e81"
}