This endpoint will unsubscribe a contact on a specific campaign from outreach. This is also marking the contact as stage: do_not_contact.
Endpoint
PUT https://api.mailstand.com/contacts/{{contact_id}}
Payload Example
Send the Campaign ID that you want to unsubscribe on the contact level.
{
    "do_not_contact": "camp_abc123"
}
200 Response
{
    status: "ok"
}
