curl --request GET \
  --url https://api.criteo.com/preview/advertisers/{advertiser-id}/coupons/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "attributes": {
      "adSetId": "<string>",
      "advertiserId": "<string>",
      "author": "<string>",
      "description": "<string>",
      "endDate": "<string>",
      "format": "<string>",
      "id": "<string>",
      "images": [
        {
          "height": 123,
          "slideUrls": [
            "<string>"
          ],
          "width": 123
        }
      ],
      "landingPageUrl": "<string>",
      "name": "<string>",
      "rotationsNumber": 123,
      "showDuration": 123,
      "showEvery": 123,
      "startDate": "<string>",
      "status": "<string>"
    },
    "id": "<string>",
    "type": "<string>"
  },
  "errors": [
    {
      "code": "<string>",
      "detail": "<string>",
      "instance": "<string>",
      "source": {},
      "stackTrace": "<string>",
      "title": "<string>",
      "traceId": "<string>",
      "traceIdentifier": "<string>"
    }
  ],
  "warnings": [
    {
      "code": "<string>",
      "detail": "<string>",
      "instance": "<string>",
      "source": {},
      "stackTrace": "<string>",
      "title": "<string>",
      "traceId": "<string>",
      "traceIdentifier": "<string>"
    }
  ]
}