局部替换歌词

curl --location 'https://api.kuai.host/suno/submit/music' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "mv": "chirp-v4-5",                                    // 模型版本
  "prompt": "完整上下文歌词…",                              // 完整上下文歌词
  "tags": "pop,female voice",                            // 风格
  "title": "我要飞(replace)",                             // 标题
  "task": "infill",                                      // 固定：局部替换
  "continue_clip_id": "8292f0c5-b682-479e-a852-dbc7d2cab4ee",  // 被编辑原曲 clipId，必填
  "metadata_params": {
    "continue_clip_id": "8292f0c5-b682-479e-a852-dbc7d2cab4ee",
    "continued_aligned_prompt": "与 prompt 相同或更长",
    "infill_start_s": 28.48,                             // 替换区间起始秒
    "infill_end_s": 53.16,                               // 替换区间结束秒
    "infill_context_start_s": 1.44,                      // 上下文参考起始秒
    "infill_context_end_s": 80.2,                          // 上下文参考结束秒
    "metadata": { "infill_lyrics": "新歌词片段" }           // 替换进去的新歌词片段
  }
}'