{
    "type": "record",
    "name": "Campaign",
    "separatorChar": "\t",
    "fields": [
        {
            "name": "campaign_id",
            "type": "string",
            "doc": "campaign id, from mysql primary key"
        },
        {
            "name": "platform",
            "type": "string",
            "doc": "ios or adr"
        },
        {
            "name": "package_name",
            "type": "string",
            "doc": "package name"
        }
    ]
}