diff --git a/src/Utils/JsonApiMessageValidator.php b/src/Utils/JsonApiMessageValidator.php
index 8aeb938..d984399 100644
--- a/src/Utils/JsonApiMessageValidator.php
+++ b/src/Utils/JsonApiMessageValidator.php
@@ -162,7 +162,7 @@ protected function getValidationErrorDocument(MessageInterface $message, array $
     {
         $errorDocument = $this->getErrorDocument($errors);
         if ($this->includeOriginalMessage) {
-            $errorDocument->setMeta(["original" => $message->getBody()]);
+            $errorDocument->setMeta(["original" => json_decode($message->getBody(), true)]);
         }
 
         return $errorDocument;