ImageGenerationResponse

{
    "created": 1735689600,
    "data": [
        {
            "url": "https://example.com/images/img-abc123.png",
            "b64_json": "iVBORw0KGgoAAAANSUhEUgAA...",
            "revised_prompt": "一张现代 API 平台首页插图，白底，青蓝色块，干净留白"
        }
    ]
}