{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "754668",
    "entityType": "User",
    "nonce": "0x9dc8f3a19c5973ec0e5d0c761a10125257f065c68efd083cba602b748cd6a3bb",
    "signature": "0x76955b1fb4feb7820b2876b227a9ce0cfd1d73ae6d488463d0f50fb5305ea88b6a9f9345eb91bd08e18095678b401dc84abf4b0f607a84601258f6323d8013bd1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}