curl --request POST \
  --url https://modelslab.com/api/v6/voice/base64_to_url \
  --header 'Content-Type: application/json' \
  --data '{
  "key": "<string>",
  "init_audio": "<string>"
}'

{
  "status": "success",
  "id": 123,
  "output": [
    "<string>"
  ]
}