After the header is the associated data for size0 and size1. The functions which generate the header always leave size0 at value 0, when receiving the data for size0 the received data is unused.
| 0x0 || 0x0 || 0x0 || Tells the server to exit.
| 0x1 ||
SystemUpdate Meta [[# Cmd69|ContentMetaKey]] || 0x38- bytes, unknown. || This is the first message used by SystemUpdate.
| 0x3 || 0x10-byte input for [[ETicket_services|es]] GetCommonTicketAndCertificateSize/GetCommonTicketAndCertificateData. || 0x8-bytes: two size u32s. Then two blocks of data with the sizes specified by the u32s. The server loads the sizes and data from [[ETicket_services|es]] GetCommonTicketAndCertificateSize/GetCommonTicketAndCertificateData. || This is presumably used by the client for Application-Delivery. The two blocks of data are used as the buffers for [[ETicket_services|es]] ImportTicket by the client.