diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index b562763..058cb4b 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -45,7 +45,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -53,7 +53,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiAttributeCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiAttributeCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!empty($val = $this->validateAttributeCreate($request))) {
             $response->header->status = RequestStatusCode::R_400;
@@ -125,7 +125,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -133,7 +133,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiAttributeTypeL11nCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiAttributeTypeL11nCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!empty($val = $this->validateAttributeTypeL11nCreate($request))) {
             $response->header->status = RequestStatusCode::R_400;
@@ -194,7 +194,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -202,7 +202,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiAttributeTypeCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiAttributeTypeCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!empty($val = $this->validateAttributeTypeCreate($request))) {
             $response->header->status = RequestStatusCode::R_400;
@@ -264,7 +264,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -272,7 +272,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiAttributeValueCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiAttributeValueCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!empty($val = $this->validateAttributeValueCreate($request))) {
             $response->header->status = RequestStatusCode::R_400;
@@ -349,7 +349,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -357,7 +357,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiAttributeValueL11nCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiAttributeValueL11nCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!empty($val = $this->validateAttributeValueL11nCreate($request))) {
             $response->header->status = RequestStatusCode::R_400;