curl --request POST \
  --url https://api.modelbeam.srv1069417.hstgr.cloud/api/v1/client/txt2audio \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'text=<string>' \
  --form model=Kokoro \
  --form lang=en-us \
  --form speed=1 \
  --form format=mp3 \
  --form sample_rate=44100 \
  --form mode=custom_voice \
  --form 'voice=<string>' \
  --form ref_audio='@example-file' \
  --form 'ref_text=<string>' \
  --form 'instruct=<string>' \
  --form 'webhook_url=<string>'

{
  "data": {
    "request_id": "550e8400-e29b-41d4-a716-446655440000"
  }
}