diff --git a/lib/Entity.js b/lib/Entity.js
index 1705b99..895c6ca 100644
--- a/lib/Entity.js
+++ b/lib/Entity.js
@@ -45,15 +45,12 @@ module.exports = class Entity {
                 {
                     obj[newKey] = property;
                 }
-                else if (property instanceof Map)
+                else if(property instanceof Map)
                 {
                     let arr = [];
                     for (let pair of property)
                     {
-                        let o = {
-                            key: pair[0],
-                            value: pair[1]
-                        };
+                        let o = [pair[0], pair[1]];
                         arr.push(o);
                     }
                     obj[newKey] = arr;