Update storefront customization (save draft)

{
    "success": true,
    "data": {
        "customization_mode": "preset",
        "identity": {
            "logo_url": "",
            "store_name": "",
            "favicon_url": "",
            "logo_footer_url": "",
            "logo_dark_url": "",
            "logo_alt_text": "",
            "logo_link_target": "/",
            "logo_width_desktop": 0,
            "logo_width_mobile": 0,
            "logo_footer_width_desktop": 0,
            "logo_footer_width_mobile": 0,
            "logo_padding": 0,
            "logo_background_color": "",
            "footer_logo_filter_mode": "none"
        },
        "theme": {
            "base_theme": "modern",
            "primary_color": "",
            "secondary_color": "",
            "accent_color": "",
            "background_color": "",
            "text_color": "",
            "button_style": "rounded",
            "enable_animations": true,
            "border_radius": 12,
            "heading_font": "Cairo",
            "nav_style": "floating"
        },
        "header": {
            "nav_layout": "left-aligned",
            "show_search_bar": true,
            "show_cart_icon": true,
            "announcement_text": "",
            "announcement_color": "#4318FF",
            "announcement_text_color": "#FFFFFF"
        },
        "hero": {
            "hero_image_url": "",
            "headline": "",
            "subtitle": "",
            "cta_text": "",
            "cta_link": ""
        },
        "products": {
            "layout": "grid",
            "products_per_row": 3,
            "show_price": true,
            "show_rating": true,
            "image_aspect": "portrait"
        },
        "footer": {
            "footer_text": "",
            "social_links": {
                "facebook": "",
                "instagram": "",
                "twitter": "",
                "whatsapp": ""
            },
            "show_newsletter": true
        },
        "navigation": {
            "links": [
                {
                    "label": "",
                    "to": ""
                }
            ],
            "show_categories_in_nav": true
        },
        "labels": {
            "home_title": "",
            "products_title": "",
            "checkout_title": "",
            "order_confirmed_title": "",
            "cart_empty": "",
            "search_placeholder": "",
            "add_to_cart": "",
            "added_to_cart": "",
            "continue_shopping": "",
            "footer_shop_heading": "",
            "footer_help_heading": "",
            "footer_contact_heading": ""
        },
        "layout": {
            "header_layout": "logo-right",
            "footer_layout": "4-col",
            "footer_columns": 4,
            "home_sections": [
                "string"
            ],
            "hero_position": "top",
            "product_card_style": "default"
        },
        "is_published": false,
        "last_published_at": "string",
        "schema_version": 0,
        "templates": {
            "property1": "string",
            "property2": "string"
        },
        "external_theme_merchant_settings": {
            "property1": "string",
            "property2": "string"
        }
    },
    "message": "string"
}