curl --request PUT \
  --url https://scx-sbx.api.jtl-software.com/v1/seller/order/accept \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "orderList": [
    {
      "channel": "MYBESTDEALCOMDE",
      "sellerId": "4711",
      "orderId": "43523-43432-43532",
      "orderAccepted": false,
      "reason": "BUYER_CANCELLED"
    }
  ]
}
'

{
  "errorList": [
    {
      "code": "VAL100",
      "message": "Required field sellerId not found",
      "severity": "error",
      "hint": "Check the field `sellerId` — it must be a non-empty string."
    }
  ]
}