{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1523538",
    "entityType": "User",
    "nonce": "0xff7ce7e3c74e6b69f2eaca78b03486ba7ed8965a3df53c99d6813d6cb6b4df1d",
    "signature": "0x2c6eec59aea5c397efd2dfc32d67099c71cf4e7dd54ccf13f648e6c6d5f1cd0d37d973da2e9c58c44fd5555db0d239f3df51fb46136fcbaa67d7d6200bd408121b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}