WebGL embed in asp.net mvc

So i made a sudoku game that i want to insert into a webpage i made in asp.net in mvc, i tried to just paste files, but that didn't work so i tried to paste the build folder into the folder with correct view, an in the index.cshtml add the lines

 <script src="~/Scripts/UnityLoader.js"></script>    
 <script>
             var gameInstance = UnityLoader.instantiate("gameContainer", "Build/Testing.json"); 
 <script>
 <div id="gameContainer" style="width: 775px; height: 600px; margin: auto"></div>

going into the page throws the error which says:

An error occured running the Unity content on this page. See your browser JavaScript console for more info. The error was: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

I have no idea where to look for help, since checking debugger says it's the normal part of JSON.parse function, that works if i try to open the index.html file provided by unity, so what do i do?