Разобрался и вот небольшой примерчик (вырезка):
$telegram = new Telegram\Bot\Api('XXXXXXXXXXXXXXXXXXXX');
$update = $this->telegram->getWebhookUpdates();
$update = json_decode($this->update, true);
$keyboard = Keyboard::make()->inline()->row(Keyboard::inlineButton(['text' => 'One more?','callback_data' => '/random']));
$telegram->editMessageText([
'chat_id' => $update['callback_query']['message']['chat']['id'],
'message_id' => $update['callback_query']['message']['message_id'],
'text' => 'Ответочка',
'reply_markup' => $keyboard,
'parse_mode' => 'markdown',
]);