In 1.6 ver. I used HttpProxy and read data from .ashx handler and save through OnBeforeStoreChanged, so it's best way for me.
but in 2.1 ver. HttpProxy is absent and I use AjaxProxy, but in this case the save fires in .ashx handler and fire by every action type.
It's possible to use in 2.1 ver proxy like "HttpProxy" ?

Regards, Alex