{"status":"ok","database":"up","redis":"up"}
{
    "campaign_id": 1,
    "sample_size": 2,
    "messages": [
        {
            "recipient": {
                "id": 1,
                "email": "alice@example.com",
                "first_name": "Alice",
                "last_name": "Smith"
            },
            "from_account": "",
            "subject": "Invoice [UNKNOWN:InvoiceNumber] \u2014 payment due %DueDate%",
            "body_html": "<h2>Invoice [UNKNOWN:InvoiceNumber]</h2><p>Dear Alice, your invoice of $677.64 is due %DueDate%.</p>",
            "raw_variables": {
                "invoice_number": "INV-7DGI-FGVX8-JER1X1-5118",
                "amount": 677.64,
                "shipping": 28.22,
                "phone": "+1 (555) 010-1234"
            },
            "warnings": ""
        },
        {
            "recipient": {
                "id": 2,
                "email": "bob@example.com",
                "first_name": "Bob",
                "last_name": "Jones"
            },
            "from_account": "",
            "subject": "Invoice [UNKNOWN:InvoiceNumber] \u2014 payment due %DueDate%",
            "body_html": "<h2>Invoice [UNKNOWN:InvoiceNumber]</h2><p>Dear Bob, your invoice of $1,021.97 is due %DueDate%.</p>",
            "raw_variables": {
                "invoice_number": "INV-Y9HK-U8WM0-CS88VJ-0655",
                "amount": 1021.97,
                "shipping": 13.92,
                "phone": "+1 (555) 010-1234"
            },
            "warnings": ""
        }
    ],
    "plan_summary": {}
}