{
    "messages" : [{
        "type" : 1,
        "destinationDeviceId" : 1,
        "destinationRegistrationId" : 222,
        "content" : "Zm9vYmFyego",
        "timestamp" : 1234
    },
    {
        "type" : 1,
        "destinationDeviceId" : 2,
        "destinationRegistrationId" : 333,
        "content" : "Zm9vYmFyego",
        "timestamp" : 1234
    },
    {
        "type" : 1,
        "destinationDeviceId" : 1,
        "destinationRegistrationId" : 222,
        "content" : "Zm9vYmFyego",
        "timestamp" : 1234
    }]
}