Update app.py

app.py

@@ -5,6 +5,7 @@ import logging
 import requests
 from datetime import datetime, timedelta
 import time
+import asyncio
 
 
 app = Flask(__name__)
@@ -56,7 +57,7 @@ def track_dl(
     track_id=request.json.get('track_id', '')
     dl_url = await get_track_download_url(url)
     result = {"url": dl_url}
-    return result
+    return jsonify(result)
 )