code: function(body) {
        body = Object(body);
        var sortedKeys = Object.keys(body).sort();
        return sortedKeys.reduce(function(signature, key) {
           return signature + key + body[key];
         }, '');
      }
docs: Sort the post parameters alphabetically and append each POST variable's key and value with no delimiter.
  @param { string } body - Post body
  @returns { string } string of sorted key values with no delimiter