{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "581397101",
    "entityType": "User",
    "nonce": "0x1d9a4d553265fcdc3e4d9f1749922f9d2a81bcf0df00d914cf2034a3d5feee81",
    "signature": "0x4e835ac540a1709ea4932d23e2eb421e0735d4b1c5472fd15bee5f0171ec94df76fb25f1ae0521c9825d6ed66f9a6a41c08534ce3e4d1784b76c6176699ae3191c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}