To override the Content-type in your clients HTTP Accept Header, append  the .json suffix or  ?format=json
To embed the response in a jsonp callback, append ?callback=myCallback
        
        HTTP + JSON
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /json/oneway/VerifyLocalNumberRequest HTTP/1.1 
Host: 7el.co 
Content-Type: application/json
Content-Length: length
{"AccountId":"String","License":"String","ContentId":0,"FeatureName":"String"}