monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [1282373502.212834] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/001/005
DEVTYPE=usb_device
PRODUCT=5ac/1300/1001
TYPE=0/0/0
BUSNUM=001
DEVNUM=005
SEQNUM=1506
ID_VENDOR=Apple
ID_VENDOR_ENC=Apple
ID_VENDOR_ID=05ac
ID_MODEL=iPod
ID_MODEL_ENC=iPod\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=1300
ID_REVISION=1001
ID_SERIAL=Apple_iPod_000A2700105C956C
ID_SERIAL_SHORT=000A2700105C956C
ID_BUS=usb
ID_USB_INTERFACES=:080650:
MAJOR=189
MINOR=4
DEVLINKS=/dev/char/189:4

UDEV  [1282373502.216838] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=5ac/1300/1001
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v05ACp1300d1001dc00dsc00dp00ic08isc06ip50
SEQNUM=1507

UDEV  [1282373502.221899] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=1508

UDEV  [1282373502.223222] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/scsi_host/host5 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/scsi_host/host5
SUBSYSTEM=scsi_host
SEQNUM=1509

UDEV  [1282373507.228082] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_target
SEQNUM=1510

UDEV  [1282373507.233703] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=1511

UDEV  [1282373507.237380] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/scsi_device/5:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=1513

UDEV  [1282373507.238441] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=1512

UDEV  [1282373507.244482] add      /devices/virtual/bdi/8:80 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/8:80
SUBSYSTEM=bdi
SEQNUM=1519

UDEV  [1282373507.245666] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0 (bsg)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0
SUBSYSTEM=bsg
DEVNAME=/dev/bsg/5:0:0:0
SEQNUM=1515
MAJOR=253
MINOR=7
DEVLINKS=/dev/char/253:7

UDEV  [1282373507.246858] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/scsi_generic/sg7 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/scsi_generic/sg7
SUBSYSTEM=scsi_generic
DEVNAME=/dev/sg7
SEQNUM=1514
MAJOR=21
MINOR=7
DEVLINKS=/dev/char/21:7

UDEV  [1282373507.248593] change   /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sd
MODALIAS=scsi:t-0x00
SEQNUM=1516

UDEV  [1282373507.311036] add      /devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/block/sdf (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/block/sdf
SUBSYSTEM=block
DEVNAME=/dev/sdf
DEVTYPE=disk
SEQNUM=1517
ID_MEDIA_PLAYER=apple-1261_1262
UDISKS_PRESENTATION_ICON_NAME=multimedia-player-apple-ipod
ID_VENDOR=Apple
ID_VENDOR_ENC=Apple\x20\x20\x20
ID_VENDOR_ID=05ac
ID_MODEL=iPod
ID_MODEL_ENC=iPod\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=1300
ID_REVISION=2.70
ID_SERIAL=Apple_iPod_000A2700105C956C-0:0
ID_SERIAL_SHORT=000A2700105C956C
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:10.4-usb-0:8:1.0-scsi-0:0:0:0
ID_PART_TABLE_TYPE=dos
UDISKS_PRESENTATION_NOPOLICY=0
UDISKS_PARTITION_TABLE=1
UDISKS_PARTITION_TABLE_SCHEME=mbr
UDISKS_PARTITION_TABLE_COUNT=1
MAJOR=8
MINOR=80
DEVLINKS=/dev/block/8:80 /dev/disk/by-id/usb-Apple_iPod_000A2700105C956C-0:0 /dev/disk/by-path/pci-0000:00:10.4-usb-0:8:1.0-scsi-0:0:0:0