Put

curl -X PUT -H "X-ACCESS-TOKEN: YOUR_ACCESS_TOKEN" -d "id=B7OxpT5ji53wLuR2" -d "itc_product_id=subscription6" -d "name=subscription6" -d "description=subscription6" -d "duration=365" -d "kiosks=webkiosk_25,webkiosk_1572" "https://api.yumpu.com/2.0/account/subscription.json"

require_once('../yumpu.php');
$yumpu = new Yumpu();
$data = array(
    'id' => 'B7OxpT5ji53wLuR2',
    'itc_product_id' => 'subscription6',
    'name' => 'subscription6',
    'duration' => 365,
    'description' => 'subscription6',
    'kiosks' => 'webkiosk_25,webkiosk_1572'
);
$putSubscription = $yumpu->putSubscription($data);
print_r($putSubscription);

var yumpu = require('yumpu');
yumpu.setToken('yourToken');
var parameters = {
  id: 'B7OxpT5ji53wLuR2',
  itc_product_id: 'subscription6',
  name: 'subscription6',
  description: 'subscription6'.
  duration: 365,
  kiosks: 'webkiosk_25,webkiosk_1572'
};
yumpu.putSubscription(parameters, function(statusCode, document){
   console.log('Status: ' + statusCode);
   console.log(document);
});