Create thumbnail zencoder / s3

I have this code that I'm following in the Zencoder documentation, but I put it to take the thumbnail in the second 10 of my video and it's always taking in the second 0

$body = [
        'input' => $inputUrl,
        'outputs' => [
            [
                'thumbnails' => [
                    [
                        "label" => "first",
                        'base_url' => $outputUrl,
                        'number' => '1',
                        'times' => [10],
                        "format"=> "jpg",
                    ],
                ],
                'notifications' => [
                    'url' => "{$notificationUrl}",
                    'format' => 'json',
                ],
            ],
        ],
    ];