diff --git a/src/DataObject.php b/src/DataObject.php
new file mode 100644
index 0000000..1ee07de
--- /dev/null
+++ b/src/DataObject.php
@@ -0,0 +1,249 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Frenet;
+
+
+/**
+ * Class DataObject
+ * @package Telegram\Framework\Data
+ */
+class DataObject implements DataObjectInterface, \ArrayAccess
+{
+    /**
+     * @var array
+     */
+    protected $data = [];
+    
+    /**
+     * DataObject constructor.
+     *
+     * @param array $data
+     */
+    public function __construct(array $data = [])
+    {
+        $this->data = $data;
+    }
+    
+    /**
+     * @param string $method
+     * @param array  $args
+     *
+     * @return array|bool|mixed|DataObject|DataObjectInterface|null
+     * @throws DataObjectException
+     */
+    public function __call($method, $args)
+    {
+        $key = $this->underscore(substr($method, 3));
+        
+        switch (substr($method, 0, 3)) {
+            case 'get':
+                $index = isset($args[0]) ? $args[0] : null;
+                return $this->getData($key);
+            case 'set':
+                $value = isset($args[0]) ? $args[0] : null;
+                return $this->setData($key, $value);
+            case 'uns':
+                return $this->unsetData($key);
+            case 'has':
+                return $this->hasData($key);
+        }
+        
+        $class = get_class($this);
+        throw new DataObjectException("The method {$method} does not exist in the class {$class}.");
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function getData($key = null)
+    {
+        if (null === $key) {
+            return $this->data;
+        }
+        
+        if (is_array($key)) {
+            return $this->data;
+        }
+        
+        if (!isset($this->data[$key])) {
+            return null;
+        }
+        
+        return $this->data[$key];
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function setData($key, $value = null)
+    {
+        if (is_array($key)) {
+            $this->data = (array) $key;
+        }
+        
+        if (!is_array($key)) {
+            $this->data[$key] = $value;
+        }
+        
+        return $this;
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function unsetData($key = null)
+    {
+        if (null === $key) {
+            $this->setData([]);
+        }
+        
+        if (is_string($key)) {
+            if (isset($this->data[$key]) || array_key_exists($key, $this->data)) {
+                unset($this->data[$key]);
+            }
+        }
+        
+        if (is_array($key)) {
+            foreach ($key as $element) {
+                $this->unsetData($element);
+            }
+        }
+        
+        return $this;
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function addData(array $data = [])
+    {
+        foreach ($data as $key => $value) {
+            if (empty($key) || empty($value)) {
+                continue;
+            }
+            
+            $this->data[$key] = $value;
+        }
+        
+        return $this;
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function hasData($key)
+    {
+        return (bool) isset($this->data[$key]);
+    }
+    
+    /**
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return empty($this->data);
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function resetData()
+    {
+        $this->data = [];
+        return $this;
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function debug()
+    {
+        return (array) $this->data;
+    }
+    
+    /**
+     * {@inheritdoc}
+     */
+    public function export(array $keys = [])
+    {
+        if (empty($keys)) {
+            return (array) $this->data;
+        }
+        
+        $result = [];
+        
+        /** @var string $key */
+        foreach ($keys as $key) {
+            $result[$key] = $this->getData($key);
+        }
+        
+        return (array) $result;
+    }
+    
+    /**
+     * Implementation of ArrayAccess::offsetSet()
+     *
+     * @link http://www.php.net/manual/en/arrayaccess.offsetset.php
+     * @param string $offset
+     * @param mixed $value
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetSet($offset, $value)
+    {
+        return $this->setData($offset, $value);
+    }
+    
+    /**
+     * Implementation of ArrayAccess::offsetExists()
+     *
+     * @link http://www.php.net/manual/en/arrayaccess.offsetexists.php
+     * @param string $offset
+     * @return boolean
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetExists($offset)
+    {
+        return $this->hasData($offset);
+    }
+    
+    /**
+     * Implementation of ArrayAccess::offsetUnset()
+     *
+     * @link http://www.php.net/manual/en/arrayaccess.offsetunset.php
+     * @param string $offset
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetUnset($offset)
+    {
+        return $this->unsetData($offset);
+    }
+    
+    /**
+     * Implementation of ArrayAccess::offsetGet()
+     *
+     * @link http://www.php.net/manual/en/arrayaccess.offsetget.php
+     * @param string $offset
+     * @return mixed
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        return $this->getData($offset);
+    }
+    
+    /**
+     * @param string $name
+     *
+     * @return string|null
+     */
+    private function underscore($name)
+    {
+        $result = preg_replace('/([A-Z]|[0-9]+)/', "_$1", $name);
+        $result = trim($result, '_');
+        $result = strtolower($result);
+        
+        return $result;
+    }
+}
diff --git a/src/DataObjectException.php b/src/DataObjectException.php
new file mode 100644
index 0000000..21ebbbd
--- /dev/null
+++ b/src/DataObjectException.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Frenet;
+
+/**
+ * Class DataObjectException
+ * @package Frenet
+ */
+class DataObjectException extends \Exception
+{
+}
diff --git a/src/DataObjectInterface.php b/src/DataObjectInterface.php
new file mode 100644
index 0000000..ea3fe27
--- /dev/null
+++ b/src/DataObjectInterface.php
@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Frenet;
+
+/**
+ * Interface DataObjectInterface
+ * @package Frenet
+ */
+interface DataObjectInterface
+{
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function getData($key = null);
+    
+    /**
+     * @param string $key
+     * @return boolean
+     */
+    public function hasData($key);
+    
+    /**
+     * @param string $key
+     * @param mixed $value
+     * @return $this
+     */
+    public function setData($key, $value = null);
+    
+    /**
+     * @param null|string $key
+     * @return $this
+     */
+    public function unsetData($key = null);
+    
+    /**
+     * @param array $data
+     * @return $this
+     */
+    public function addData(array $data = []);
+    
+    /**
+     * @return $this
+     */
+    public function resetData();
+    
+    /**
+     * @return array
+     */
+    public function debug();
+    
+    /**
+     * @param array $fields
+     *
+     * @return array
+     */
+    public function export(array $fields = []);
+    
+    /**
+     * @return boolean
+     */
+    public function isEmpty();
+}