curl --request POST \
     --url https://api.criteo.com/preview/retail-media/catalog/products/batch \
     --header 'accept: application/json' \
     --header 'content-type: application/json'

{
	"entries":[
		{
			"merchantId":"123",
			"method":"insert",
			"product":{
        "id":"id",
        "title":"myTitle",
        "description":"myDescription",
        "link":"https://www.advertiser.com/myProduct",
        "imageLink":"https://www.advertiser.com/300x200/myProduct",
        "brand":"",
        "googleProductCategory":null,
        "gtin":"123456789",
        "price":{
          "currency":"EUR",
          "value":"49.99"
        },
        "availability":"in stock"
      },
      "feedId":"string"
    }
  ]
}

{
  "operationToken" : "eyJhbGciOiJub25lIn0.eyJwYXJ0bmVySWQiOjEyMywib3BlcmF0aW9uSWQiOiIxNzE2YzExNC1mZThjLTRiZmYtOGFiNC0zYzM5YTQwY2M1ZGMiLCJleHAiOjE2MTYxNDIwMDJ9."
}