Get product service list interface

uid	N	string
sid	N	string
time	N	string
sign	Y	string

{
    "status":200,
    "product_list":
        {
            "pid":"1",
            "icon":"https://*******",
            "original_price":"2.00",
            "price":"1.99"
        },
        {
            "pid":"2",
            "icon":"https://*******",
            "original_price":"3.00",
            "price":"2.99"
        }
}

icon尺寸：64*64 px