gistfile1.json

{
    "Changes": [
        {
            "Action": "DELETE", 
            "ResourceRecordSet": {
                "Name": "jb-zX.<domain>.", 
                "ResourceRecords": [
                    {
                        "Value": "<old-elastic-ip>"
                    }
                ], 
                "TTL": 300, 
                "Type": "A"
            }
        }, 
        {
            "Action": "CREATE", 
            "ResourceRecordSet": {
                "Name": "jb1.<domain>.", 
                "ResourceRecords": [
                    {
                        "Value": "<new-elastic-ip>"
                    }
                ], 
                "TTL": 300, 
                "Type": "A"
            }
        }
    ]
}