{"template":{"name":"event-announcement","description":"Event announcement with prominent date badge, gradient background, and event details footer.","aspect_ratio":"40:21","placeholders":[{"key":"brand","description":"Brand or product name."},{"key":"day","description":"Custom placeholder value injected into the template."},{"key":"eventType","description":"Custom placeholder value injected into the template."},{"key":"location","description":"Custom placeholder value injected into the template."},{"key":"month","description":"Custom placeholder value injected into the template."},{"key":"subtitle","description":"Supporting subtitle or body text."},{"key":"time","description":"Custom placeholder value injected into the template."},{"key":"title","description":"Main title text shown prominently."}]}}