OrderItemSchema(OrderItemSchema)

{
    "inserts": [
        {
            "name": "thank_you_card",
            "size": "5x8cm",
            "url": "https://example.com/insert_file_1"
        },
        {
            "name": "Sticker",
            "size": "3x3cm",
            "url": "https://example.com/insert_file_2"
        }
    ],
    "preview_files": [
        {
            "key": "mockup_front_url",
            "url": "https://example.com/preview_file_1"
        },
        {
            "key": "mockup_back_url",
            "url": "https://example.com/preview_file_2"
        }
    ],
    "print_files": [
        {
            "key": "front",
            "print_tech": "dtf",
            "url": "https://example.com/print_file_1"
        },
        {
            "key": "back",
            "print_tech": "square",
            "url": "https://example.com/print_file_2"
        }
    ],
    "production_config": "default",
    "quantity": 2,
    "sku": "SKU001"
}