Endpoint: https://jtapi.jtexpress.co.th/jts-tha-openplatform-api/api/order/cancel
Digest: ZWU3ZmY5YjM0NmY5M2QzNmRlOWYyMzQ1ZTc4MjU3ZjI=
Request:
{
    "eccompanyid": "UPMESH",
    "customerid": "UPMESH",
    "txlogisticid": "jtc3cfb779c4e31656050026998102",
    "reason": "seller cancelled"
}

Response:
{"logisticproviderid":"JNT","responseitems":[{"success":"false","reason":"S03"}]}