当我将update_attributes发送到RESTful API时，如何更改XML标记？

I've got a non-Rails RESTful API that I can easily connect to with ActiveResource, and GETting the data when I do a find simply works. But, updating the data isn't as straight forward. I think it's because the API wants the XML body wrapped in this non-standard XML tag of I've got a non-Rails RESTful API that I can eas