I have tried many times to make a Ring Out call from my web application that I am building that has its own little dialpad. I have made sure that the Outbound caller ID setting is not blocked for the RingOut from web setting. I am completely able to make a ringOut phone call using the API explorer, but I feel like I just might be missing some headers, or some wierd quirk that the documentation does not describe anywhere. And trust me I have looked all over the place. Either way, Here is an example request that I am making using Node.js to start the phone call.

router.post("/make/ring/out", function (req, res, next) {      var access = req.body.access;      var callInfo = req.body.callInfo;      var option = {          method: 'POST',          url: 'https://platform.ringcentral.com/restapi/v1.0/account/~/extension/~/ring-out',          headers: {              'Cache-Control': 'no-cache',              'Authorization': 'Bearer ' + access,          },          form: {              callerId: {                  phoneNumber: callInfo.callId              },              to: {                  phoneNumber: callInfo.phone1              },              from: {                  phoneNumber: callInfo.from              },              playPrompt: true,              country: {id: "1"}          }      };      request(option, function (error, response, body) {          if (error) throw new Error(error);          var bod = JSON.parse(body);              res.send(bod);              res.end();          } else {              res.send(bod);              res.end();          }      });  });

with this setup, I always get the error that I described in the title.

{
  "message" : "Unsupported Media Type",
  "errors" : [ ]
}

I also have the ringcentral softphone open and loaded into the same account that I have the access token for. I havent ever been able to make a successful ringOut call. So any help would be supremely appreciated!

Thanks in advance!