diff --git a/src/Snowcap/Emarsys/Client.php b/src/Snowcap/Emarsys/Client.php
index c89488e..349a7e0 100644
--- a/src/Snowcap/Emarsys/Client.php
+++ b/src/Snowcap/Emarsys/Client.php
@@ -536,6 +536,17 @@ public function getEmailResponses(array $data)
         return $this->send(HttpClient::POST, 'email/getresponses', $data);
     }
 
+    /**
+     * Count the unsubscription statistics of a specific campaign.
+     *
+     * @param array $data
+     * @return Response
+     */
+    public function setEmailUnsubscriptionCount(array $data)
+    {
+        return $this->send(HttpClient::POST, 'email/unsubscribe', $data);
+    }
+
     /**
      * Returns a list of email categories which can be used in email creation.
      *
diff --git a/src/Snowcap/Emarsys/Response.php b/src/Snowcap/Emarsys/Response.php
index 1d23cd4..42a6e6f 100644
--- a/src/Snowcap/Emarsys/Response.php
+++ b/src/Snowcap/Emarsys/Response.php
@@ -34,13 +34,13 @@ class Response
      */
     function __construct(array $result = array())
     {
-        if (!isset($result['replyCode']) || !isset($result['replyText']) || !isset($result['data'])) {
+        if (!isset($result['replyCode']) || !isset($result['replyText']) || !array_key_exists('data', $result)) {
             throw new ClientException('Invalid result structure');
         }
 
         $this->replyCode = $result['replyCode'];
         $this->replyText = $result['replyText'];
-        $this->data = $result['data'];
+        $this->data = (array) $result['data'];
     }
 
     /**