WP API v2 image upload from media endpoint

/*
 * WP REST API version 2.0-beta7
 * API base url ishttp://www.example.com/wp-json
 *
 * Reference
 * https://wordpress.org/support/topic/new-post-with-image
 */
/*
 * Get Guzzle HTTP Client. That client has been authenticated.
 */
$client = ...
/*
 * Get binary data of image.
 * $path is file path to be uploaded.
 */
$handle                    = fopen($path, 'r');
$fdata                     = fread($handle, filesize($path));
/*
 * Post media.
 * Request to WP REST API media endpoint
 */
$response = $client->request(
  'POST',
  'wp/v2/media',
  [
    'multipart' => [
      [
        'name'     => 'file',
        'contents' => $fdata,
        'filename' => basename($path),
      ],

   ],
);