"Delete Own" Permission Confluence Cloud - REST Call

I’m trying to add a group to all the spaces within our Confluence with the permission to view, add comment/attachment and delete own permissions.

I’m able to add the view, add comment and attachment using the operations listed in the following api document : Add new permission to space

But I don’t see an option to add the “Delete Own” permission in the operations provided.

Is this permission available is the api? Can someone please help me with this?