How Can I update a existing service in catalog through API

Hello, I have a service registered in the consul catalog and now I want to update that particular service with some fields. How can I do it ? I mean which endpoint should I use to do a POST call to the consul-server ?

I have followed this guide Catalog - HTTP API | Consul by HashiCorp and tried a POST call but POST call is not allowed. So how can I update my service with a PUT call without using namespace as it is a enterprise feature and I don’t have it

Can someone can community help on this and clear this understanding for me please ?