Triggering Web Service from out of the box BO

Hi all,

I want to trigger an external web service from account BO.

for example, each time the "Save" button is been clicked, C4C will trigger the WS.

I know that for a custom object I can create a custom action for triggering the WS, and add it to the BeforeSave event or another event.

However, this is not a custom BO, so is there a way to add custom action to account BO without using embedded component?

Thanks,

Dror.