layer4-payload UUID persistence

You can try this irule:

when HTTP_REQUEST {
     extract UUID parameter value from URI
    set uuid [URI::query [HTTP::uri] UUID]
    if { !($uuid equals "") } {
    persist uie $uuid
  }
}
when LB_SELECTED {
     add a persistence record when pool member is selected.
    if { !($uuid equals "") } {
        persist add uie $uuid
    }
}