$beanstalk = new Amp\Beanstalk\BeanstalkClient("tcp://127.0.0.1:11300?tube=foobar");

$payload = json_encode([
    "job" => bin2hex(random_bytes(16)),
    "type" => "compress-image"
    "path" => "/path/to/image.png"
]);

$jobId = yield $beanstalk->put($payload);