Extrinsic 31392-1

{
  "heartbeat": {
    "blockNumber": 31390,
    "sessionIndex": 523,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x62987100ff408602c80f4e8e648f4a775c313ed44f3a7900b19e28f5adb78e73371da575fd5c8823b49083de961668e499a7791bcc70442d5f191b3f313fcd8b"
}