{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x38aab7e0b94b1464195cbb2ee9acbe1c6edd815b5c60ecf007a03238bb2e2ccf",
    "signature": "0x15bef40b668d940b796e6c6f23cbe820d19b64f1fce0493ba667c075f3eb9b23511bfbcad84703226b226f6edbb1c26617fa14842068184bdb269593b8195d731c",
    "signer": "0xbA83b3D0645C0C99c76cB296B0BA81bD641DB81c",
    "userId": "951995708"
  }
}