Sailthru API Docs

{
    "url": "https://leadthing.dev/api/sailthru",
    "method": "POST",
    "headers": {
        "apiKey": "Sign in to get your LEADTHING.DEV API key",
        "content-type": "application/json"
    },
    "body": {
        firstname: "John",
        lastname: "Smith",
        email: "john.smith@example.com",
        listName: "listName",
        sailthruApiKey: "SAILTHRU_API_KEY",
        sailthruSecret: "SAILTHRU_SECRET"
    }
}