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Also in continuation to your previous post, I have no experience with this, so I suggest you try the references below, and if not helpful, try waiting for a Clarizen expert.
Some references:
https://api.clarizen.com/v2.0/services/
https://success.clarizen.com/hc/en-us/community/posts/203993198-Clarizen-Web-Services-API-Guide-V1-0