Switch order state

Some states for an order:

delivery_confirmed - When the order is marked as the order has been confirmed.
closed - When the order is marked as closed.
accepted - When the order is marked as accepted.
refused - When the order is marked as refused.
received - The initial status of an order or when the order is marked as received.

xxxxxxxxxx
curl --request POST \
     --url https://app-staging.b2brouter.net/orders/id/mark_as.json \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
{
  "state": "delivery_confirmed"
}
'

422 Unprocessable Entity