const options = {
method: 'PATCH',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({webinarProperties: {}})
};
fetch('https://services.leadconnectorhq.com/funnels/funnel/webinar/{id}', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));