Posting complex array with Alamofire - ios

Question

I have a problem with posting complex dynamic array with Alamofire to my REST API. I would like to post something like this;
let parameters = [
"A": "a",
"B": myObject.getStringValue(),
"C": myDate.timeIntervalSince1970,
"D": myObject2.getStringValue(),
"E": MyComplexData
];
Alamofire.request(.POST, "http://myrestapi.com/myaction", parameters: parameters);
Where the myComplexData is an array-like variable, which I would like to fill with a loop. I want receive data in the server like this:
[
"A": "a",
"B": "b",
"C": 24916942128,
"D": "d",
"E": [0: [ id: "firstID", value: "firstValue" ], 1: [ id: "secondID", value: "secondValue" ]]
]
My question is, how can I create a dynamic array (or dictionary?) into the MyComplexData to receive data like this?
Thanks in advance,
Robert

Answer 1

Finally, based on #Catalina T. answer, I did it with JSON encoded data. The full code:
var myComplexData = Dictionary<String, String>();
for i in previousCollectedDynamicDataArray {
myComplexData[i.getID()] = i.getVal();
}
let parameters = [
"A":"A",
"B": myObject.getStringValue(),
"C": myDate.timeIntervalSince1970,
"D": myObject2.getStringValue(),
"E": myComplexData
];
Alamofire.request(.POST, "http://myrestapi.com/myaction", parameters: [ "data": objToJSONString(parameters) ]);
And this is the objToJSONString function:
func objToJSONString(obj: AnyObject) -> String {
guard let data = try? NSJSONSerialization.dataWithJSONObject(obj, options: .PrettyPrinted),
let jsonString = NSString(data: data, encoding: NSUTF8StringEncoding)
else {
return "";
}
return jsonString as String;
}
And the server received the "data" post variable the JSON encoded data inside.