Is there an example of update via javascript xmlrpl call? My code is not working:

new instance.web.Model("sale.order.line").call("write",[sale_order_line_id], [values]).then(function(result){
     console.log("UPDATE SALE ORDER LINE");
});

I get this error: "TypeError: proxy() argument after ** must be a mapping, not int"

Something is wrong with given parameters. How can I do it?