i'm trying to send POST HTTP request with JSON content on Kamailio V 5.2.0.

i have two main headers "content type" & "Authentication " in addition i have the json content .

when i'm using curl request it look like : 

Curl -H "Authentication ket = xxxxx" -H "content type : JSON" -d " {the JSON content}" https://xxxxx.com/send

So how can i use the Http_client module to send such requests ??