curl --request GET \
  --url https://api.topsort.com/public/v1/campaign-service/json-templates/{json-template-id} \
  --header 'Authorization: Bearer <token>'

{
  "adFormat": "banner",
  "createdAt": "2023-11-07T05:31:56Z",
  "description": "<string>",
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "isArchived": false,
  "jsonSchema": {},
  "marketplaceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "previewScreenshot": "<string>",
  "previewUrl": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z"
}