How To Access Item In An Object When Key Is String? [duplicate]

I’m receiving this:

FormData {
  MessagingServiceSid: '12345',
  RetryCount: '0',
  EventType: 'onConversationAdded',
  State: 'active',
  Attributes: '{}',
  DateCreated: '2025-02-04T19:19:12.867Z',
  ChatServiceSid: '12345',
  'MessagingBinding.ProxyAddress': '12345',
  'MessagingBinding.Address': '12345',
  AccountSid: '12345',
  Source: 'SMS',
  ConversationSid: '12345'
}

How do I get the value 12345 out of of ‘MessagingBinding.ProxyAddress’: ‘1235’

Thanks in advance

I’m sure I’ve done this 100 times but for some reason today I just cannot figure it out.

I can get everything else by doing this:

const body = await req.formData()
const EventType = body.EventType

But I cannot figure out how to get they key value when the key is a string like ‘MessagingBinding.ProxyAddress’