Extrinsic 174690-1

{
  "heartbeat": {
    "blockNumber": 174689,
    "sessionIndex": 2911,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xfc8d337db0470528657c8f9f442673f4adbf11f32be25a347cc6679cace7bd05d7ba7e16658fcabccfcb339af36f7d91a612849b2f7d5521f7d8b721c354cb8c"
}