Extrinsic 18285-1

{
  "heartbeat": {
    "blockNumber": 18284,
    "sessionIndex": 304,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x46cd5047f96b5f1862f5bf174bbde0d8926a393f0df5ae81386998dfe0c8666c40ce2b9dc8bebfbc097170243087c7b45ac238ae7069d8b858c98b2d538a9188"
}