TRANSPORT_PROTOCOL=OXTA TRANSPORT_PROTOCOL_VERSION=1.0 REQUEST_TYPE=SEND MESSAGE_ID=0ahd6a007nvji90r00004igq MESSAGE_TYPE=XML MESSAGE_STANDARD=OAG TRANSACTION_TYPE=PO TRANSACTION_SUBTYPE=ACK DOCUMENT_NUMBER=PO_1234 PARTYID=1619 PARTY_SITE_ID=1619 PROTOCOL_TYPE=HTTPS-OXTA PROTOCOL_ADDRESS= USERNAME=userID PASSWORD=password PAYLOAD=...