class InstantNsReqSerializer(serializers.Serializer):
     locationConstraints = LocationConstraintSerializer(required=False, allow_null=True)
-    additionalParamForNs = serializers.CharField(help_text="Additional param for NS", required=False, allow_null=True)
+    # additionalParamForNs = serializers.CharField(help_text="Additional param for NS", required=False, allow_null=True)
+    additionalParamForNs = serializers.DictField(
+        help_text="Additional param for NS",
+        child=serializers.CharField(help_text="Additional parameters", allow_blank=True),
+        required=False,
+        allow_null=True
+    )
 
 
 class NsOperateJobSerializer(serializers.Serializer):