the following line in command_executor_handler.py

properties = " " + re.escape(MessageToJson(request.properties))

serializes dynamic properties protobuf message to a json object, and escapes the json string using re.escape, which doesn't escape the double quotes, so it gives 

2021-11-14 18:09:03,336|e5eb1f1e-3386-435d-b290-d49d8af8db4c|143748f9-3cd5-4910-81c9-a4601ff2ea58|SDNC_DG|ThreadPoolExecutor-0_0|CommandExecutorHandler|INFO|################################

  {\

\ \ "network-address":\ "172\.20\.183\.176/28"\

}

which prevents python from parsing json input to dict 

==================================

so, using this line

properties = " " + re.escape(MessageToJson(request.properties)).replace('"','
"')

gives correct escaped string, and python can parse the json into dict properly

2021-11-14 18:25:20,605|e5eb1f1e-3386-435d-b290-d49d8af8db4c|143748f9-3cd5-4910-81c9-a4601ff2ea58|SDNC_DG|ThreadPoolExecutor-0_2|CommandExecutorHandler|INFO|################################

  {\

\ \ \"network-address\":\ \"172\.20\.183\.176/28\"\

}