{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe87fe8fbf05de03dba4ab7f6bbd451dba4ced3e78994957daec20353752f580b",
    "signature": "0xf72ea040120efd3b00cf4ccb8ef000d28d4c0e984aac1f909f259ccb768cbc446f49fe6863a2710647afd72e9eb722acc6dadbfce491a822c3e2f049b94be0221b",
    "signer": "0x5CC64B02265Dcf47361435fD77775D146B493471",
    "userId": "109867509"
  }
}