Your question is not completely clear.
In general for new record in view4 in your data structure you'll need to make sure that it is associated with view3.
If you want to insert data just to view4 - put it as an independent view in your data model.
this hierarchy presents relation between viewObjects so if you want to use view4 independently then goto your ApplicationModule and add this view4 as independent viewObject (no parent)
see how to add ViewObjects in ApplicationModule- Adding View Object instance to Application Module -
This view inside another view is due to relationship between views. There must be entity association or view links between the views.
Now in order to add new record to view4, you don't have to use nested view4. You need to use view4 which is just under DataControl. In AM , you need to shuttle this view4 as parent and not to nest it under any else view/VO.