Post request with UTF-8 Encoding

Question

I'm trying to POST a request to a url with XML data. Some of the XML Data (aka the messageBody) has characters in Hebrew so I get this error -

TypeError [ERR_UNESCAPED_CHARACTERS]: Request path contains unescaped characters 

So it means I have to encode to UTF-8, how do I do that? Here's my code -

const messageBody = `סמס
נסיון
נסיון2`;
const xmlData =
    `<?xml version="1.0" encoding="utf-8"?>
    <Sms>
    <User>
     <Username>username</Username>
    <ApiToken>key</ApiToken>
    </User>
    <Content Type="sms">
    <Message>${messageBody}</Message>
    </Content>
    <Recipients>
    <PhoneNumber>${cNumber}</PhoneNumber>
    </Recipients>
    <Settings>
    <Sender>sender</Sender>
    </Settings>
    </Sms>`;

return request({
    url: `someUrl?xml=${xmlData}`,
    method: "POST",
    headers: {
        "content-type": "application/xml; charset=utf-8",
    },
    body: xmlData
}, function (error, response, body) {
    if (error) {
        return console.log(`Error Appeared : ${error}`)
    } else {
        return console.log(`Sent SMS : ${response}`);
    }
});