{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x87838702fe9a99a386b93234bee12886cfc755afda849fb19c8c7c0588e3fb8c",
    "signature": "0xf2f4bff375f7b911c193374237c7646b983ec22951054ea8986e517e606568db2fadab738420b5beb69937e6f246d9b2282462ed8014e95e4d40ba0a364173eb1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}