diff --git a/src/RegistrationRequest.php b/src/RegistrationRequest.php
index cfa401f..e43d098 100644
--- a/src/RegistrationRequest.php
+++ b/src/RegistrationRequest.php
@@ -43,4 +43,10 @@ public function appId()
     {
         return $this->appId;
     }
+
+    public function __toString()
+    {
+        return json_encode($this);
+    }
+
 }
\ No newline at end of file