diff --git a/api/modules/authserver/models/Form.php b/api/modules/authserver/models/Form.php
index c749538..02006d8 100644
--- a/api/modules/authserver/models/Form.php
+++ b/api/modules/authserver/models/Form.php
@@ -16,10 +16,10 @@ abstract class Form extends Model {
 
     public function loadByPost() {
         $data = Yii::$app->request->post();
-        // TODO: проверить, парсит ли Yii2 raw body и что он делает, если там неспаршенный json
-        /*if (empty($data)) {
-            $data = $request->getJsonRawBody(true);
-        }*/
+        if (empty($data)) {
+            // TODO: помнится у Yii2 есть механизм парсинга данных входящего запроса. Лучше будет сделать это там
+            $data = json_decode(Yii::$app->request->getRawBody(), true);
+        }
 
         return $this->load($data);
     }
diff --git a/tests/codeception/api/functional/authserver/AuthorizationCest.php b/tests/codeception/api/functional/authserver/AuthorizationCest.php
index b46f120..cf712ed 100644
--- a/tests/codeception/api/functional/authserver/AuthorizationCest.php
+++ b/tests/codeception/api/functional/authserver/AuthorizationCest.php
@@ -38,6 +38,17 @@ class AuthorizationCest {
         $this->testSuccessResponse($I);
     }
 
+    public function byEmailWithParamsAsJsonInPostBody(FunctionalTester $I) {
+        $I->wantTo('authenticate by email and password, passing values as serialized string in post body');
+        $this->route->authenticate(json_encode([
+            'username' => 'admin@ely.by',
+            'password' => 'password_0',
+            'clientToken' => Uuid::uuid4()->toString(),
+        ]));
+
+        $this->testSuccessResponse($I);
+    }
+
     public function wrongArguments(FunctionalTester $I) {
         $I->wantTo('get error on wrong amount of arguments');
         $this->route->authenticate([