diff --git a/defunityads/src/unityads_callback.cpp b/defunityads/src/unityads_callback.cpp
index bd63001..1e411c8 100755
--- a/defunityads/src/unityads_callback.cpp
+++ b/defunityads/src/unityads_callback.cpp
@@ -35,34 +35,9 @@ namespace dmUnityAds {
         }
 
         lua_pushnumber(L, type);
-        bool is_fail = false;
-        dmJson::Document doc;
-        dmJson::Result r = dmJson::Parse(json, &doc);
-        if (r == dmJson::RESULT_OK && doc.m_NodeCount > 0)
-        {
-            char error_str_out[128];
-            if (dmScript::JsonToLua(L, &doc, 0, error_str_out, sizeof(error_str_out)) < 0)
-            {
-                dmLogError("Failed converting object JSON to Lua; %s", error_str_out);
-                is_fail = true;
-            }
-        } 
-        else
-        {
-            dmLogError("Failed to parse JSON object(%d): (%s)", r, json);
-            is_fail = true;
-        }
-        dmJson::Free(&doc);
-        if (is_fail)
-        {
-            lua_pop(L, 2);
-            assert(top == lua_gettop(L));
-            return;
-        }
-
-        int number_of_arguments = 3;
+        dmScript::JsonToLua(L, json, strlen(json)); // throws lua error if it fails
 
-        int ret = dmScript::PCall(L, number_of_arguments, 0);
+        int ret = dmScript::PCall(L, 3, 0);
         (void)ret;
         dmScript::TeardownCallback(m_luaCallback);