How to work with RTE collection in content block

Hello all,
How to work with RTE collection in content block?
Example:
I have some payload:
{"ctx":{"firstName":"string127","myCollection":[{"doc":"string127 #1"},{"doc":"string127 #2"}]}}

How to make from it an array? I need to get data for each doc from my collection.

<%
var myCollection= context.rtEvent.ctx.myCollection;
%>

<%=myCollection%> == [object EntityCollection] 

Best regards,
Aleks