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

{
  "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": {}
  }
}