How to set reminders in Meetings module using Deluge?

Hi,

I'm writing a Deluge function that adds a reminder to a Meetings record, so participants get emailed before the event. I've been using Postman to inspect the contents of the Meetings module, and saw that reminders were formatted like this...

"Remind_Participants": [
    {
        "period": "minutes",
        "unit": "10"
    }

"Remind_At": [
    {
        "unit": 2,
        "period": "hours"
    },
    {
        "unit": 1,
        "period": "hours"
    }
],

where Remind_Participants corresponds to the "Participants Reminder" field in the Meetings record, and Remind_At corresponds to the field just called "Reminder."

When I try creating/updating a CRM record using data which is formulated in this way in a Map,

{...other fields...,"Remind_At":[{"period":"minutes","unit":30}]}

I simply get no response or error code, I get a successful response but no reminder is set in the Meeting record.

How can I use Deluge to set reminders in Meetings records?

Thanks