Gravity Forms, JSON, Webhooks and Zoho Flow

I have form that I use to populate a Module in Zoho CRM.

When the data is sent back from Gravity Forms, it's sent back in this format (I've cleansed the data for privacy):

{
   4 : "email@email.com",
   5 : "+61999999999",
   6 : "emai2l@email.com",
   7 : "Summary",
   8 : "URL Link",
   9 : "URL Link",
   13 : "Headline",
   14 : "Desc",
   16 : "Imagename",
   17 : "Intro",
   date_updated : "2024-03-15 03:03:44",
   source_url : "url",
   is_read : "0",
   currency : "AUD",
   id : "1366",
   user_agent : "agent details",
   date_created : "2024-03-15 03:03:44",
   ip : "ip address",
   form_id : "5",
   created_by : "1",
   15.1 : "1",
   is_starred : "0",
   11.2 : "",
   11.1 : "Text",
   3.2 : "",
   3.3 : "First Name",
   3.4 : "",
   3.6 : "Last Name",
   3.8 : "",
   15.3 : "1",
   15.2 : "I agree to the media release",
   status : "active"
}

The issue is the fields

3.3, 3.6, 11.1, 15.1 and 15.2

These aren't being mapped to the fields in flow.

I've tried:

${trigger.3.3}

${trigger.3[3]}

${trigger.3[0].3}

and then just gave up.

How do we address this?