Create a new email template, to set up a campaign's email. You'll need a name. The subject is optional, and the body isn't set here: add it with POST /api/v1/campaign/template/email/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.