curl -i -X POST \
  https://platform-api.vistarmedia.com/api/dsp/v1/creatives \
  -H 'Content-Type: application/json' \
  -H 'Cookie: YOUR_API_KEY_HERE' \
  -d '{
    "creatives": [
      {
        "asset_upload_id": "juIGaOygS0CBBqtmXHamqA",
        "campaign_ids": [
          "juIGaOygS0CBBqtmXHamqA"
        ],
        "name": "Some-Advertising-Campaign-2025.jpg",
        "pixel_url": "https://apixelurl.com",
        "category_ids": [
          "juIGaOygS0CBBqtmXHamqA"
        ],
        "insertion_order_ids": [
          "juIGaOygS0CBBqtmXHamqA"
        ],
        "advertiser_id": "juIGaOygS0CBBqtmXHamqA"
      }
    ]
  }'