protected function startLargeFile($fileName, $contentType, $bucketId)
    {
        $response = $this->generateAuthenticatedClient([
            'fileName'      => $fileName,
            'contentType'   => $contentType,
            'bucketId'      => $bucketId,
        ])->request('POST', '/b2_start_large_file');

        return $response;
    }