How to send latitude and longitude to Meetup API update event?

Question

I can't seem to get an event to have a location.

I have tried posting data as:

{
  'lat,lon': '11.11111,11.11111'
}

and

{
  lat: '11.11111',
  lon: '11.11111'
}

and

{
  lat: parseInt(11.1111, 10),
  lon: parseInt(11.1111, 10)
}

nothing seems to stick. (the actual values for lat, lon are coming from google maps api, and i've confirmed they are correct)

Specifically, i am using the meetup-api npm module to make the requests

meetup api docs / update event