title: NSString to JSON string
body: <p>I have a <code>NSString</code> with below format .Currently it is not a valid JSON string .I want to change it as a JSON string and store it in an <code>NSArray</code>.
  This is my <code>NSString.</code></p>
  
  <pre><code>[, {"Agent":" Visitor", "Time":"03:18 AM", "Message":"Msg from : file:///Users/satheesanop/Desktop/something.htmlIP Address : 182.72.139.142Country : IndiaCity : MadrasRegionName : Tamil N?duBrowser : Chrome 22OS : Mac", }, {"Agent":" agent name", "Time":"03:21 AM", "Message":"Thank you for contacting us.How may i help you ?", }, {"Agent":" Visitor", "Time":"03:22 AM", "Message":"Some message.", }]
  </code></pre>
  
  <p>Any help is appreciated .</p>