How to Change TTS API Response Format from String to Audio File (.mp3)

[teneous]

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Hi，I have a TTS API http://127.0.0.1:17861/v1/tts/json which makes user's text to audio. And the request format is application/json, the reponse is audio/mpeg.

This is my workflow image

This is HTTP content

As you can see, the body return string, it's so wired, how can I change it to audio(.mp3).

[backearth1]

same requirement