How to split multiple camera in msg Gst-nvmsgbroker with rabbitmq?

I send six camera’s msg to server use deepstream-test4 ,but I notice all of person and cars 's numbers are mixed together.how to split them? I want to only number for each camera. may I only repeat this?

[sensor0]
enable=1
type=Camera
id=CAMERA_ID
location=45.293701447;-75.8303914499;48.1557479338
description="Entrance of Garage Right Lane"
coordinate=5.2;10.1;11.2

Sorry for a late response.
You can get a detailed how meta data generated following documentation Gst-nvmsgconv plugin
https://docs.nvidia.com/metropolis/deepstream/plugin-manual/index.html#page/DeepStream_Plugin_Manual%2Fdeepstream_plugin_details.02.14.html
we also have test sample about meta data under apps/sample_apps/deepstream-user-metadata-test/ or
deepstream-gst-metadata-test/, you can refer to it.