Background of The Request
At the moment there are no ways for user or administrators to export or save a space into a template that could be use in the future by other users when they create a new space or pages.
For example :
A company would like to have their own space template with links in the sidebar and the body of the page prefigured with some panels in the space.
For now they only can create a blank space or copy an existing one, then create the pages that appear in the sidebar.
It will ease them if they can just generate it instead of creating a blank space or copy an existing one.