OptionalbodyOptionalinstallationOnly accept deliveries for this installation id; others receive 403.
OptionaltimestampReject deliveries whose timestamp is further than this from the server
clock. Off by default: Shortcut redelivers failed deliveries later with
the original timestamp, so a window rejects legitimate retries.
OptionalworkspaceOnly accept deliveries for this workspace id; others receive 403.
Maximum request-body size in bytes. Defaults to 2 MiB.