curl --request POST \
  --url 'https://api.example.com/v2/recommend/products/product?api_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "tenant": "<string>",
  "market": "<string>",
  "type": "<string>",
  "product_id": "<string>",
  "locale": "<string>",
  "limit": 64,
  "user_id": "<string>",
  "session_id": "<string>",
  "dsid": "<string>",
  "document_referrer": "<string>",
  "metadata": {}
}
'

{
  "displays": [
    {}
  ],
  "error": "<string>",
  "variant": 123,
  "experiment_id": "<string>"
}