Authorization: Bearer TOKEN
Content-Length: 0
Content-Type: multipart/mixed; boundary=xYzZY123

--xYzZY123
POST /v3/urlNotifications:publish
Accept: application/json
Content-Length: 51
Content-Type: application/json
Content-ID: 1

{"url":"http://example.com/1","type":"URL_UPDATED"}
--xYzZY123
POST /v3/urlNotifications:publish
Accept: application/json
Content-Length: 51
Content-Type: application/json
Content-ID: 2

{"url":"http://example.com/2","type":"URL_UPDATED"}
--xYzZY123-