{
  "task_id": "collect_creative_content_1777383798",
  "collection_type": "creative_content",
  "collected_at": "2026-04-28T21:43:28.818664",
  "materials": [
    {
      "material_id": "creative_content_20260428_214328_1",
      "title": "creative_content示例内容1",
      "content": "这是creative_content的示例内容...",
      "source": "system",
      "tags": [
        "creative_content",
        "示例"
      ],
      "relevance_score": 0.8,
      "quality_score": 0.75
    }
  ]
}