const url = 'https://api.you.com/upload';

fetch(url, {

method: 'POST',

body: JSON.stringify({

email: 'uyencan89@gmail.com',

fileName: 'my-file.txt',

fileData: 'base64encoded-content-of-my-file.txt'

}),

headers: {

'Content-Type': 'application/json'

}

});