{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x381b91a6ef7b444ca1016bf866cdd77e7e364e0aaddcd91cfbe0fa948dcb3ea2",
    "signature": "0xd56cb5a4d9a458f78708107303326d9c84cdb87e164a347d0ac73975c31c534d0c233b70c1fe5c1e6e70c2c65216e979aba88840a92f1e069935070566d24ac31b",
    "signer": "0x8f48B3F81A6B0E48D7F84F48847DdE0147E56626",
    "userId": "647390479"
  }
}