title: Can't create Instances of JSON Objects unless I Clone
body: <p>I fell into an issue the first time trying to create instances of .json objects.</p>
  
  <p>for example lets say in my node project I have this model:</p>
  
  <p><strong>city.json</strong></p>
  
  <pre><code>{
      "links": {
          "self": null,
          "parent": null
      },
      "id": null,
      "name":{
          "full": null,
          "abbreviated": null,
          "urlFriendlyName": null
      },
      "countries": null
  }
  </code></pre>
  
  <p>I found that in my code, when I included this via a require at the top of a module, that if I tried to use it more than once, I couldn't and ended up having to create an instance of this like this:</p>
  
  <p>I had a utility module that would do this:</p>
  
  <p><strong>modelUtilities.js</strong></p>
  
  <pre><code>var cityEntity = require('../src/entities/city');
  
  
  module.exports = {
      "createCityEntity": createCityEntity
      .. and a bunch more helpers
  };    
  function createCityEntity(cityId, stateId, fullname, abbreviatedName, urlFriendlyName){
      var city = clone(cityEntity);
  
      city.id = cityId;
      city.name.full = fullname;
      city.name.abbreviated = abbreviatedName;
      city.name.urlFriendlyName = urlFriendlyName;
      city.links.self = "/cities/" + cityId;
      city.links.parent = "/states/" + stateId;
  
      return city;
  }
  
  function clone(obj){
      return JSON.parse(JSON.stringify(obj));
  };
  </code></pre>
  
  <p>I don't remember exactly the issue but I know I had to do this clone or else I couldn't end up with multiple different instances of that .json object for use in my SUT code and also for reuse in my tests because I was using that structure to also create a dummy city for stub data.</p>
  
  <p>Any idea if I was just thinking about .json wrong or if this is normal?  Or not?</p>