Azure Translation API - Throttling client requests

I'm trying to throttle the number of requests a client can make to my translator service which uses Azure Translation API.

The following link from Microsoft describes how to limit requests, but it's not clear where in the request this throttling information should be added. I assume the request headers?

https://docs.microsoft.com/en-us/azure/api-management/api-management-sample-flexible-throttling

Here is the curl. Note the rate limiting headers at the end. Is this the way to do it?

// Pass secret key and region using headers to a custom endpoint
curl -X POST " my-ch-n.cognitiveservices.azure.com/translator/text/v3.0/translate?to=fr" \
-H "Ocp-Apim-Subscription-Key: xxx" \
-H "Ocp-Apim-Subscription-Region: switzerlandnorth" \
-H "Content-Type: application/json" \
-H "rate-limit-by-key: calls=10 renewal-period=60 counter-key=1.1.1.1" \
-d "[{'Text':'Hello'}]" -v

from Azure Translation API - Throttling client requests