title: Post json formatted data on server swift
body: <p>I am new to json and swift
  I want to send json formatted data and header on server
  Here is Code</p>
  
  <pre><code>    "Destination":{"ContactPerson":"Garry Jackson","Address":{"PostCode":"4104","StreetAddress":"Bay View","Suburb":"BAY VIEW","BuildingName":"15 Le Quesne Rd","City":"NAPIER","CountryCode":"NZ"},"PhoneNumber":"027 3356871","Email":"jacko.bv@xtra.co.nz","Name":"Garry Jackson"} 
  
  
      let parameters = [
          "Packages" : ["Length" : Length, "Type" : "", "Kg" : Weight, "Height" : Height, "Width" : Width, "Name" : SkuName],
          "issignaturerequired" : true,
          "Outputs":["LABEL_PNG_100X175"],
          "DeliveryReference":86882,
          "Destination":["ContactPerson":self.CustomerFirstname,
                         "Address":["PostCode":self.PostalCode,"StreetAddress":self.Address1,"Suburb":self.City,"BuildingName":"ABC","City":self.City,"CountryCode":"AU"],
                         "PhoneNumber":9998406081,"Email":self.CustomerEmail,"Name":self.CustomerFirstname],
          "PrintToPrinter":true,
          "SendTrackingEmail":"",
          "Commodities":[["UnitKg":1.0000,"Currency":"NZD","Country":"NZ","Units":1,"Description":"Drums Drum Accessories Drum Bags","UnitValue":44.0],["UnitKg":1.0000,"Currency":"NZD","Country":"NZ","Units":1,"Description":"Drums Drum Accessories Drum Bags","UnitValue":44.0]],
          "DeliveryInstructions":"None"
      ]
  
      let headers = [
          "Content-Type" : "application/json",
          "Access_Key":"Key"
      ]
  
      Alamofire.request(.POST, "http://api.omniparcel.com/labels/printcheapestcourier", headers: headers, parameters:  parameters).responseJSON {
          response in
          print(response)
          let json = JSON(response.data!) //SwiftyJSON
      }
  </code></pre>
  
  <p>How to post this data in swift</p>