{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "838777725",
    "entityType": "User",
    "nonce": "0xf1d6b9e9e6bdb93f078ce99d6d71d5a81f3cb973b8cf1fca7e170d6e6573f719",
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    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}