{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3504",
    "entityType": "User",
    "nonce": "0xe2dae8e6a799a69bd869e00055255ed59bf07ccc5fe206771bf070dfafe7e001",
    "signature": "0x024da3fc0006bb39d6f46d6e1b419e9225cee8cafc4c8f8289210ed02e145c4a1ce0a692a84300e44ded1ce711e46ae0bba073eb5e20a70ccf0987685a59f1231c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}