{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "395602",
    "entityType": "User",
    "nonce": "0x90b354a5057ff8fab5b5254fba1ca1a18841b79e7e96f2fac6a00c40d2a92e8b",
    "signature": "0x57ef5a9b80e67eacf0f04a05605b112afb798776fefac6c4f2e10c92f896a81d45e94d46fff8e181ab5acadc708d58322e13464c44a2829a93a0dbe57e8010d31b",
    "signer": "0xf03E2eb658f4057Ea4255CF34BcE6009938B86f6",
    "userId": "904522318"
  }
}