'2019-01-18T12:00:00.000Z', 'name' => 'Test Name', 'email' => 'test@example.com', 'customFields' => { 'country' => 'US', 'state' => 'AZ, }, ]); $request = new HttpRequest('https://api.joinnow.live/webinars/:shortId/registration', HttpRequest::METH_POST); $request->addHeaders([ 'Content-Type' => 'application/json', 'Content-Length' => strlen($data); ]); $request->addRawPostData($data); try { $request->send(); echo $request->getResponseCode(); echo $request->getResponseBody(); } catch (HttpException $ex) { echo $ex; } ?>

This Works!