curl --request GET \
  --url https://api.eflow.team/v1/networks/custom/creative \
  --header 'X-Eflow-Api-Key: <api-key>'

{
  "custom_creative_settings": [
    {
      "network_custom_creative_setting_id": 123,
      "network_id": 123,
      "network_offer_creative_ids": [
        123
      ],
      "network_affiliate_ids": [
        123
      ],
      "name": "<string>",
      "custom_setting_status": "active",
      "time_created": 123,
      "time_saved": 123,
      "relationship": {
        "affiliates": [
          {}
        ],
        "creative": {}
      }
    }
  ],
  "paging": {
    "page": 123,
    "page_size": 123,
    "total_count": 123
  }
}