Extrinsic 39730-1

{
  "heartbeat": {
    "blockNumber": 39728,
    "sessionIndex": 662,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xb6f1d8dcf87a9de376d1f62bad40a21e317ac298d4f5319f73a6aae455479c19c84d44fd5aae0839d8a792e6955e3fe12204515b330c519f51326e189e22f78e"
}