{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "10449019",
    "entityType": "User",
    "nonce": "0xd4673c7d4775beb334b53dfdf02bfc4a6721c625baa2a4daa0adb4a7afd78d6c",
    "signature": "0xd409671756222041c16f3c46c29b4e4b3a8f444446d9e9ca1ed3492ad501071003100c14efd4fba24a8217e5cb722697de61f531429282438dc2114b695c08851c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}