HTTP is not giving response, but Status code is 200 (Success)

I am using HTTP to connect Google VISION and get image annotation using API KEY. connectivity been done and no issues and getting status code as 200. But JSON response is {} ie empty.

The same request content (request JSON) is working in Google Vision-API explore option and returns results.

Could you please help or suggest . Thanks

Can you share the http request properties?

Also make sure same call it is working in another api tool.

Thanks for your response. Call is working on other API tool. Even here for the exceptions I got REPONSE with errors. Only on success i could not able to do. Will share the properties.

Any updates?