VOL-3266: Added documentation for starting to manage a device

Change-Id: I2abf8c6e39f9edf523ff81ef0e06b57905245d18
diff --git a/docs/managing_device.drawio b/docs/managing_device.drawio
new file mode 100755
index 0000000..60b311d
--- /dev/null
+++ b/docs/managing_device.drawio
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