fix.js

fetch('http://spoor-api.ft.com/px.gif', {
	method: 'post',
	headers: {
		'Accept': 'application/json',
		'Content-Type': 'application/json'
	},
	timeout: 5000,
	headers: {
		'content-length': Buffer.byteLength(JSON.stringify(event), 'utf8')
	},
	body: JSON.stringify(event)
}).then(function (response) {
	console.log('POST', response.status, response.headers);
}).catch(function (err) {
	console.error('error', err);
});