             method: "POST",
             url: serviceURL + encodedPath,
             credentials: credentials,
-            headerParameters: defaultHeaders,
-            contentType: "application/json",
-            queryItems: nil,
+            headerParameters: headers,
             messageBody: body
         )
 

            method: "PUT",
            url: serviceURL + encodedPath,
            credentials: credentials,
            headerParameters: defaultHeaders,
            contentType: "application/json",
            queryItems: nil,
            messageBody: body
        )


            method: "GET",
            url: serviceURL + "/v1/pronunciation",
            credentials: credentials,
            headerParameters: headers,
            queryItems: queryParameters
        )

        // execute REST request
