curl --request POST \
  --url https://studio-api.onlytraffic.com/api/external/v1/cpc/creatives \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-Key: <api-key>' \
  --form of_account_id=123 \
  --form 'display_name=<string>' \
  --form 'description=<string>' \
  --form 'internal_name=<string>' \
  --form link_type=manual \
  --form 'url=<string>' \
  --form 'images=<string>' \
  --form 'image_hashes=<string>' \
  --form images.items='@example-file'

{
  "success": true,
  "data": {
    "public_id": "<string>"
  }
}