{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12615893",
    "entityType": "User",
    "nonce": "0x34a59955b9f559fa1e9b9aa940ed6a752ec0c140a37a007ba1063ae2d1eadd38",
    "signature": "0xf97392fa165639aefbb43bb96bd6e3a043752ead424703a9c20bb31fa74856e27cba743fc394c642ce1aedab85755ccb7dd07a43843c9ab459344b8e6c1b8a2d1b",
    "signer": "0x03015d975f8B0d07425826BFAc15A4492F59a5B7",
    "userId": "658736296"
  }
}