CourseSimpleInfoDTO

{
    "id": 0,
    "name": "string",
    "coverUrl": "string",
    "price": 0,
    "status": 0,
    "free": true,
    "firstCateId": 0,
    "secondCateId": 0,
    "thirdCateId": 0,
    "sectionNum": 0,
    "purchaseEndTime": "string",
    "validDuration": 0
}