Magento SOAP API v2-将可配置产品添加到购物车

我在向购物车添加可配置产品时遇到问题。我将以下数组设置为函数

$productList_final = 
Array
(
    [0] => Array
    (
        [product_id] => 3
        [sku] => Wallpaper
        [name] => Wallpaper
        [set] => 4
        [type] => configurable
        [category_ids] => Array
            (
                [0] => 3
            )

        [website_ids] => Array
            (
                [0] => 1
            )

        [qty] => 1.0000
        [options] => Array
            (
                [info_buyRequest] => Array
                    (
                        [uenc] => aHR0cDovL2xvY2FsaG9zdC9zeW5jaHJvbml6ZS1vcmRlci9pbmRleC5waHAvY2VsbC1waG9uZXMvd2FsbHBhcGVyLmh0bWw,
                        [product] => 2
                        [form_key] => rYNDd47kaYLWGl4a
                        [related_product] => 
                        [super_attribute] => Array
                            (
                                [0] => Array
                                    (
                                        [key] => 92
                                        [value] => 5
                                    )

                            )

                        [qty] => 1
                    )

                [attributes_info] => Array
                    (
                        [0] => Array
                            (
                                [label] => Color
                                [value] => Green
                            )

                    )

                [simple_name] => Wallpaper-Green
                [simple_sku] => Wallpaper-Green
                [product_calculations] => 1
                [shipment_type] => 0
            )

    )

)

但它会生成错误，SOAP-error:Encoding:object在调用以下函数时没有“key”属性

$apiClient->shoppingCartProductAdd($sessionId, $cartId, $productList_final);

---

任何关于我应该如何准备上述数组的线索-选项super\u属性？？？

Magento Stack Exchange中已经有一个关于此问题的线程-