diff --git a/src/Bot/Model/Entity/Message/Message.php b/src/Bot/Model/Entity/Message/Message.php
index 324f6a8..f67c2c0 100644
--- a/src/Bot/Model/Entity/Message/Message.php
+++ b/src/Bot/Model/Entity/Message/Message.php
@@ -125,7 +125,7 @@ class Message implements ModelInterface
      * @var bool $isRead
      *
      * @Type("bool")
-     * @Accessor(getter="getIsRead",setter="setIsRead")
+     * @Accessor(getter="isRead",setter="setIsRead")
      * @SkipWhenEmpty()
      */
     private $isRead;
@@ -134,7 +134,7 @@ class Message implements ModelInterface
      * @var bool $isEdit
      *
      * @Type("bool")
-     * @Accessor(getter="getIsEdit",setter="setIsEdit")
+     * @Accessor(getter="isEdit",setter="setIsEdit")
      * @SkipWhenEmpty()
      */
     private $isEdit;
diff --git a/src/Serializer.php b/src/Serializer.php
index c8c6075..3f92541 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -73,8 +73,11 @@ class Serializer
         if ($context instanceof DeserializationContext) {
             switch ($from) {
                 case self::S_ARRAY:
+                    $filtered = array_filter($data, static function ($el) {
+                        return $el !== null;
+                    });
                     $deserialized = $serializer
-                        ->fromArray(array_filter($data), self::normalizeNamespace($entityType), $context);
+                        ->fromArray($filtered, self::normalizeNamespace($entityType), $context);
                     break;
                 case self::S_JSON:
                     $deserialized = $serializer
diff --git a/tests/Bot/Tests/Model/MessageTest.php b/tests/Bot/Tests/Model/MessageTest.php
new file mode 100644
index 0000000..593d733
--- /dev/null
+++ b/tests/Bot/Tests/Model/MessageTest.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace RetailCrm\Mg\Bot\Tests\Model;
+
+use RetailCrm\Common\Serializer;
+use RetailCrm\Mg\Bot\Model\Entity\Message\Message;
+use PHPUnit\Framework\TestCase;
+
+class MessageTest extends TestCase
+{
+    /**
+     * @dataProvider dataProvider_noContent
+     * @param $content
+     */
+    public function testDeserialization_NoContent($content): void
+    {
+        $item = ['content' => $content];
+
+        /** @var Message $result */
+        $result = Serializer::deserialize($item, Message::class, Serializer::S_ARRAY);
+
+        self::assertNull($result->getContent());
+    }
+
+    /**
+     * @dataProvider dataProvider_withContent
+     * @param $content
+     */
+    public function testDeserialization_WithContent($content): void
+    {
+        $item = ['content' => $content];
+
+        /** @var Message $result */
+        $result = Serializer::deserialize($item, Message::class, Serializer::S_ARRAY);
+
+        self::assertNotNull($result->getContent());
+        self::assertEquals($content, $result->getContent());
+    }
+
+    public function testSerialization_NoContent(): void
+    {
+        $item = new Message();
+
+        $result = Serializer::serialize($item);
+
+        self::assertEquals('{}', $result);
+    }
+
+    /**
+     * @dataProvider dataProvider_withContent
+     * @param $content
+     * @param $json
+     */
+    public function testSerialization_WithContent($content, $json): void
+    {
+        $item = new Message();
+        $item->setContent($content);
+
+        $result = Serializer::serialize($item);
+
+        self::assertEquals($json, $result);
+    }
+
+    public function dataProvider_noContent(): array
+    {
+        return [
+            [null],
+        ];
+    }
+
+    public function dataProvider_withContent(): array
+    {
+        return [
+            ['', '{"content":""}'],
+            ['0', '{"content":"0"}'],
+            ['Something', '{"content":"Something"}'],
+        ];
+    }
+}