<route url="/V1/products" method="POST">
        <service class="MagentoCatalogApiProductRepositoryInterface" method="save"/>
        <resources>
            <resource ref="Magento_Catalog::products" />
        </resources>
    </route>
    <route url="/V1/products/:sku" method="PUT">
        <service class="MagentoCatalogApiProductRepositoryInterface" method="save" />
        <resources>
            <resource ref="Magento_Catalog::products" />
        </resources>
    </route>

[ { "item_id": 11, "sku": "MH07-M-Green", "qty": 1, "name": "Hero Hoodie", "price": 54, "product_type": "configurable", "quote_id": "8", "product_option":{ "extension_attributes":{ "configurable_item_options":[{"option_id": "90", "option_value": 53 }, {"option_id": "138",…] } } } ]

{ "cartItem": { "itemId": 11, "sku": "MH07-M-Green", "qty": 2, "name": "Hero Hoodie", "price": 1000, "productType": "configurable ", "quoteId": "8" } }