Cloud integration (1nce)

Dear community,

I am looking for intial guidance how to integrate measurements sent from the 1nce cloud to my home assistant instance. My instance is reachable externally via https://xyzdomain.net:8123.

As per the 1nce documentation (see Webhook Configuration) I have to name the endpoint URL and define the headers required for authorization and configuration that are expected by the endpoint. The endpoint must support HTTPS POST and should respond with 2xx HTTP status code.
Measuerment will be sent in JSON format. Here is an example for a GPS location measurement (latitude, longitude, timestamp):
{
6/0/0: 9.123
6/0/1: 42.123
6/0/5: 12745
}

How can I set-up an endpoint in homeassistant and consume the measurements?
Your support/ideas are very welcome.

I think this is a good way to start : Native app integration | Home Assistant Developer Docs