Magento2 How to Pass Parameter as Object in GraphQL?

I want to send parameter as object in Graphql but Internal server error occurs. For Reference i have attached graph query and error generated screenshot.
I have also attached model and schema.graphql file’s data and path.

Graphql Query and Error : https://i.imgur.com/OEwF4EA.png

VendorModuleetcschema.graphqls

    type Query {
        Getproductbyid(input: Getbyidinput!): Getbyidoutput @resolver(class: "\Vendor\Module_name\Model\Resolver\setproductwebp") @doc(description:"Contact us form") 
    }

@doc (description:"Get Product Value By Sku.......")
input Getbyidinput {
    sku : String
    base64_encoded_data : String
    type : String
    name : String
}

type Getbyidoutput {
 message :String
}

VendorModuleModelResolverSetproductwebp.php

<?php
namespace VendorModuleModelResolver;

use MagentoFrameworkGraphQlExceptionGraphQlInputException;
use MagentoFrameworkGraphQlExceptionGraphQlNoSuchEntityException;
use MagentoFrameworkGraphQlQueryResolverInterface;
use MagentoFrameworkGraphQlConfigElementField;
use MagentoFrameworkGraphQlSchemaTypeResolveInfo;
use MagentoEmailModelTemplateFilter;
use MagentoCatalogModelProductGalleryGalleryManagement;
use MagentoFrameworkAppFilesystemDirectoryList;
use MagentoFrameworkApiImageContentValidatorInterface;
use MagentoCatalogApiDataProductAttributeMediaGalleryEntryInterface;
use MagentoFrameworkExceptionInputException;
use MagentoFrameworkExceptionNoSuchEntityException;
use MagentoFrameworkExceptionStateException;


class Setproductwebp implements ResolverInterface
{

    private  $helperapi;
    private  $helpercustomer;
    private  $filter;

    public function __construct(

        GalleryManagement $gallery,
        MagentoCatalogApiDataProductAttributeMediaGalleryEntryInterface $entry,
        MagentoCatalogApiProductRepositoryInterface $productRepository,
        Data $helper,
        ImageContentValidatorInterface $contentValidator,
        MagentoFrameworkApiDataImageContentInterface $imageContentInterface
    ) {
        $this->gallery = $gallery;
        $this->entry=$entry;
        $this->productRepository = $productRepository;
        $this->imageContentInterface=$imageContentInterface;
        $this->contentValidator = $contentValidator;
    }


    public function resolve(Field $field, $context, ResolveInfo $info, array $value = null, array $args = null)
    {
        try {
            $sku = $args['input']['sku'];
            $base64_encoded_data=$args['input']['base64_encoded_data'];
            $type=$args['input']['type'];
            $name=$args['input']['name'];
            $entry = array("content" => array("base64_encoded_data"=> $base64_encoded_data, "type"=> $type, "name"=> $name));

             $storeManager->info(print_r($entry,true));
             $result = $this->gallery->create($sku,$entry);
             $output = ['message' => 'Webp Image uploaded' ];


        }
        catch (Exception $exception)
        {
            $output['message'] = "not work";
            return $output;
        }
    }
}