Regex String with optional parts

Question

I have this two example string, and I am building a regex for cover both

[[CONTENT:Image|||23123123123|||urlClipping|||true]]
[[CONTENT:Image|||23123123123|||urlClipping]]

I'm need to separate the inner params from the separators (|||) and the beginning and end ([[,]])

So far I've tried with

\[{2}CONTENT:([^\|]*)\|{3}([^\]]*)\|{3}([^\]]*)(\|{3}([^\]]*))?\]{2}

And

\[{2}CONTENT:([^\|]*)\|{3}([^\]]*)\|{3}([^\]]*)(?:\|{3}([^\]]*))?\]{2}

But both o them merges two params into one

How can I fix this regex?