Create a new landing page design, to set up how a campaign's landing page looks and what it asks. You'll need a name (title). The page's content and options aren't saved here: add them with POST /api/v1/campaign/template/landing-page/update. Returns the template with its id.

Prerequisites: a bearer token. Optional: a location id (store_id) to tie the template to one location.

Authentication: Account token. The template is saved under the account of the user behind the token. store_id, when sent, must be a location inside your own account tree; otherwise 422.

Rate limit: none.