Where can we send the reminder notification related parameters initial package

Hi, Where can we send the reminder notification related parameters in initial package creation request. Please share me the sample initial package creation json request for setting reminder related information. As of now i am using create a reminder schedule by making a POST request to the base URL(https://sandbox.e-signlive.ca/api/packages/{packageID}/reminders) with the following example JSON: { "startInDaysDelay": 1, "repetitionsCount": 5, "intervalInDays": 1, "packageId": "{packageId}" } But getting 500 exception.