@@ -1,6 +1,7 @@
 import json
 import logging
 
+from django.http import QueryDict
 from django.utils.translation import gettext_lazy as _
 from drf_spectacular.utils import extend_schema
 from rest_framework import status
@@ -83,18 +84,21 @@ class VoiceView(BaseGenerationView):
         info = request.data.get('info', {})
         if isinstance(info, str):
             try:
-                info = json.loads(info)
+                info = json.loads(info) if info else {}
             except json.JSONDecodeError:
                 return Response({'detail': _('Invalid info payload')}, status=HTTP_400_BAD_REQUEST)
+        if not isinstance(info, dict):
+            info = {}
         if voice_id.isdigit():
-            info.update({'voice_id': int(voice_id)})
+            info['voice_id'] = int(voice_id)
         else:
-            info.update({'preset_id': voice_id})
-        ct = getattr(request, 'content_type', '')
-        if 'multipart/form-data' in ct:
+            info['preset_id'] = voice_id
+        if isinstance(request.data, QueryDict):
+            request.data._mutable = True
             request.data['info'] = json.dumps(info, ensure_ascii=False)
+            request.data._mutable = False
         else:
-            request.data["info"] = info
+            request.data['info'] = info
         return super().post(request, model_slug, *args, **kwargs)