Remarks:
1) In Request Body: * fields is objects. So this fields have their own properties. Below is the property info,
a. ProjectExt – AccessibilityType (It’s value should be 2), ProjectPassword (This field is required to protect a project with password. If it’s value is blank, then it means no password protection require.) and IsPasswordProtected (If ProjectPassword is blank then it should be false else true).

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