upload audio file with python

Question

I need to upload an audio file with python, but i'm having difficulties.

If I ngrep the upload i see something like

T 172.31.41.159:15561 -> 172.31.39.127:80 [AP] #324
POST /v1/wizard-campaign/18cb83c1-b6a3-11ec-a986-02ca52d15783/media-audio HTTP/1.1.
Host: whatever.
Content-Length: 70535.
authorization: Bearer XXXXXXX.
user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.87 Safari/537.36.
content-type: multipart/form-data; boundary=----WebKitFormBoundaryWVhfRY6Fs7rKntcI.
origin: https://whatever.
referer: https://whatever/.
accept-encoding: gzip, deflate, br.
accept-language: en-US,en;q=0.9.
.


T 172.31.41.159:15561 -> 172.31.39.127:80 [A] #326
------WebKitFormBoundaryWVhfRY6Fs7rKntcI.
Content-Disposition: form-data; name="mediaFile"; filename="mensaje-de-saludo.mp3".
Content-Type: audio/mpeg.
.
ID3......!TXXX......

I tried with

    audioDataJSON = {
        "originalName": filename,
        "time": math.ceil(audio.info.length)
    }
    file = { open(filename,'rb') }
    audioData = json.dumps(audioDataJSON)
    resp = requests.post(base_url + "/v1/wizard-campaign/" + id + "/media-audio", headers=headers, data=audioData , files=file)

But it's failing with "too many values to unpack"

Any help is greatly appreciated!

David