Optional idempotency key - this must be unique across firm's projects
reminder_schedulestring
Set the project reminder schedule (case-insensitive). One of: Standard, All Off (alias: Project and Payments Off), "Project Off, Payment On" (alias: "Project Off, Payments On"), Daily, Every other day, Every 4 days, Weekly, Every other week, Every 3 weeks, Monthly. Custom schedules are not supported.