Suppose at client side i have an Entity proxy to edit by the UI and when i click save button, the last modified time is save in the entity as a field.

 //start
 MyEntityProxy proxy = getProxy();//fetched from server
 Request<Void> saveRequest = requestFact.myEntityProxyRequest().save(proxy);
 editorDriver.edit(proxy, saveRequest.getRequestContext());
 editorDriver.flush();

 //user modifies UI
 ....

 //save
 editorDriver.flush();
 saveRequest.fire();

The problem is, where to insert the proxy.setLastModifiedTime(data) call? I always got

java.lang.IllegalStateException: The AutoBean has been frozen.

Thanks.