audio_url. It is a publicly accessible CDN address and supports the mp3 suffix.
Here, the audio_url we input is https://cdn.acedata.cloud/suno_demo.mp3, which is a publicly accessible CDN address.
audio_id field in data is the song ID after upload.
After obtaining the song ID, we can use the Producer Audios Generation API to perform custom song generation. For example, if action is passed as upload_extend and audio_id is passed as the returned song ID, a new song can be generated based on the reference audio.
