Mailchimp opt-outs to Zoho CRM contact record

Mailchimp opt-outs to Zoho CRM contact record

Hello,
Is it possible to create an automation/sync so that when a contact unsubscribes in Mailchimp, their contact record is updated in Zoho with the Email Opt Out field checked?
I don't want to sync all Mailchimp contacts into my Zoho CRM, I just need to enable a look-up so that if a contact unsubscribes in Mailchimp AND they have an existing Zoho CRM contact record, that CRM record is updated.
Thanks!