test.js

function saveUserDictionary() {
    // get information about all user dictionaries
    TXTextControl.Proofing.getUserDictionaryInfo(function (e) {

        // loop through all dictionaries
        e.forEach(function (item) {

            // save the dictionary
            TXTextControl.Proofing.saveUserDictionary(item.name, function (name, words) {
                // create a new dictionary JSON object
                var userDict = { language : item.language, name : name, words : words };

                // call the Web API and pass the dictionary object
                var serviceURL = "/api/Dictionary/SaveUserDictionary/";

                $.ajax({
                    type: "POST",
                    url: serviceURL,
                    contentType: 'application/json',
                    dataType: "json",
                    data: JSON.stringify(userDict),
                    success: successFunc,
                    error: errorFunc
                });

                function successFunc(data, status) {
                    alert(data);
                }

                function errorFunc() {
                    console.log("error");
                }
            });
        });
    })
}