{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2499",
    "entityType": "User",
    "nonce": "0x0ea054a94bdebc6ab500638b5d31b52cefbb7bd082a741add1e167e044cdc1d6",
    "signature": "0x8ba9e2699b27db4e3c089156acb4e982a331b657273f99837fb88b49bd5fd5635cb287060d9533feb173bc559eb0d4e98b221bcc52b8ffe0493882af5fd92e851c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}