This string is part a JSON object/file:
"Mask" : "{0}(CASE WHEN {1} = {2} THEN {3} ELSE 0 END) {4}"
Will JSON recognize that as part of standard JSON notation or do I need to escape those curly braces s somehow?
If so, how does one escape curly braces in JSON?
No. Curly braces do not have to be escaped in JSON.