Content-Type: text/event-stream; charset=utf-8
X-Test: sent with the first event
Cache-Control: no-cache

retry: 3000

: keep-alive
: second comment line

id: 1
data: привет &lt;tag&gt; <tag>

event: update 
id: 2
data: first line
data: second line
data: third line

event: json
data: {
data: "text":"привет",
data: "login":"user"
data: }

data: 

event: error
data: event must be a single line