Extrinsic 4045-1

{
  "heartbeat": {
    "blockNumber": 4043,
    "sessionIndex": 67,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x0ef9020da834d8bfce1eae28fa4a95c44ae4da37abd03d27de312739635977320e2d2a858f44d97b19c2b78266811f42c69fdc5631aad63112979ab10455c88a"
}