warmbly/integrations/make/modules/addContactToCampaign/api.iml.json

{
    "url": "/contacts",
    "method": "POST",
    "body": [
        {
            "email": "{{parameters.email}}",
            "first_name": "{{parameters.first_name}}",
            "last_name": "{{parameters.last_name}}",
            "company": "{{parameters.company}}",
            "campaigns": "{{add(emptyarray, parameters.campaign_id)}}"
        }
    ],
    "response": {
        "output": "{{ifempty(body.data.0, body)}}"
    }
}