{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0xb84357d54de89884512e8c69223dad3b292660084080fa7c9ee9c68e3d9b02c6",
    "signature": "0xbe6c0a9f64e975af01182a82561d4ddc3af706583b7f089655cee62b6da75d8c2064fd3e11ac2e48ea5fcd3e702c7cf4d8b5cdfc31405790154ea9354aedf4a01c",
    "signer": "0x45C682dAb9Cd8ED5e055aC2F6a860Db5F14c27C9",
    "userId": "611525840"
  }
}