{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "210748",
    "entityType": "User",
    "nonce": "0x6ff931df08ef913c03a9a43668e9c0abf4e5ba8b00e4edeaea399fccf6283a85",
    "signature": "0xe6dc2eb453425f39cc5c4700ad3f4206b324ead581f10bdfc6e60b630cffa17b2de8501cf1f6a1938cf51d337e8ad87b8771cf5ff18d42dd18044efbc9dda78e1c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}