GA code for Tracking

Hi,
I am trying to add GA code In AMP AMP Analytics Options where in Add new entry options
I have added this code but showing some error can you please check what is wrong?

{
“vars”:{
“account”:”UA-xxxxxx-1″}
,”triggers”:{
“trackPageview”:{
“on”:”visible”,”request”:”pageview”}
,”trackEvent”:{
“on”:”click”,”selector”:”.order,.purcbtn,.ebtn-link,.ebtn,.ele-s-sm”,”request”:”event”,”vars”:{
“eventCategory”:”AMPBuyNow”,”eventAction”:”${
eventAction}
“,”eventLabel”:”${
eventLabel}
“}
}
}
}

Thanks,