Extrinsic 38372-1

{
  "heartbeat": {
    "blockNumber": 38371,
    "sessionIndex": 639,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x20a5a4fa6a9c57b4144268ab6a948786055404bd13f7e7bf2e3f75b93df7fb5dfc7ace53b14656df518d97c8f96d6772ffe24455c50f04359b5e0169ddcc948f"
}