SingleResultPageNotificationResponse

{
    "code": "1",
    "message": "success",
    "data": {
        "content": [
            {
                "message": "새로운 댓글이 작성되었습니다.",
                "notificationId": 1,
                "articleId": 100,
                "type": "COMMENT"
            }
        ],
        "page": 0,
        "size": 20,
        "totalElements": 100,
        "totalPages": 5,
        "hasNext": true,
        "hasPrevious": false
    }
}