curl --request POST \
  --url https://api.criteo.com/preview/retail-media/catalog/products/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "entries": [
    {
      "merchantId": 123,
      "batchId": 123,
      "feedId": "<string>",
      "itemGroupId": "<string>",
      "productId": "<string>"
    }
  ]
}
'

{
  "operationToken": "<string>"
}