confirm JSON file

gzcat ~/Download/xxx(cut) -xx-part-0001.gz | jq '.' | less
{
    "event_type": "ApplicationStart",
    "event_timestamp": 1446391243721,
    "arrival_timestamp":1446442595071,
    "event_version": "3.0",
    "application":{
        "app_id": "",
        "cognito_identity_pool_id": "us-east-1:",
        "package_name":"net.nowtom.Share",
        "sdk":{
            "name":"aws-sdk-iOS",
            "version":"2.3.4"
        },
        "title":"Unknown",
        "version_name":"1",
        "version_code":"1.0"
    },
    "client":{
        "client_id":"",
        "cognito_id":"us-east-1:"
    },
}