title: Convert String to NSObject Swift 3
body: <p>Can anyone assist me with this problem? I'm getting this swift compiler error:  </p>
  
  <blockquote>
    <p>'Cannot convert value of type 'String' to expected dictionary key type 'NSObject'</p>
  </blockquote>
  
  <pre><code>let orderParameters =
  
          ["customer": [     &lt;- //Getting the error in this line
              "first_name": "Jon",
              "last_name":"Doe",
              "email": "john.doe@gmail.com"],
         "shipping": "free-shipping",
         "gateway": "dummy",
         "bill_to": [
              "first_name": "Jon",
              "last_name": "Doe",
              "address_1": "123 Sunny Street",
              "address_2": "Sunnycreek",
              "city": "Sunnyvale",
              "county": "California",
              "country": "US",
              "postcode": "CA94040",
              "phone": "18768509132"],
              "ship_to": "bill_to"
          ] as [NSObject: AnyObject]
  </code></pre>
  
  <p>Do I insert <strong><em>as NSObject</em></strong> for the 'customer' parameter?</p>