{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x45a67ac9d0d9fba3740495265cce70a5bb7821ab55b70258875a38c5f09edba4",
    "signature": "0x855e9eb68f22d2438573501236dfa141d34c2586d9d46e7e86f93e4968c134c56720eda8523625220550291b49188a55d7d51cf2fe368629ccf368d3498c20341c",
    "signer": "0xfB6436C438F897b7eA739876B4Cfcca832868820",
    "userId": "512354652"
  }
}