DocumentLineItem

{
    "sequence": 1,
    "productCode": "PRD-001",
    "productName": "บริการพัฒนาซอฟต์แวร์",
    "quantity": 1,
    "unitName": "งาน",
    "unitPrice": 10000,
    "vatRate": 7,
    "discountAmount": 0,
    "total": 10000
}