{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "154520",
    "entityType": "User",
    "nonce": "0xcca638f6e9dc32039d44b36eebe34b8b8c37c941fc8225666a66fb7f5a9e5562",
    "signature": "0xf2325d21bc6938dc3da8c1df6ceaba0aeec3a25ad80bd8ec140a9bb7629115587abe997c021c1bb704d4e96c1f65cd1d4c27a4c456e14ff5071721f6eb2738cc1c",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}