curl --request GET \
  --url https://api.jogg.ai/v2/template/custom/{id} \
  --header 'x-api-key: <api-key>'

{
  "code": 0,
  "msg": "Success",
  "data": {
    "template_id": 123,
    "name": "My Template",
    "cover_url": "https://example.com/cover.jpg",
    "preview_url": "https://example.com/preview.mp4",
    "aspect_ratio": 0,
    "variables": [
      {
        "type": "text",
        "name": "title"
      }
    ]
  }
}