Location - BLE Assets

WS /api-ws/v1/stream

{
    "subscribe": "/sites/{site_id}/stats/maps/{map_id}/assets"
}

{
    "event": "data",
    "channel": "/sites/4ac1dcf4-9d8b-7211-65c4-057819f0862b/stats/maps/63eda950-c6da-11e4-a628-60f81dd250cc/assets",
    "data": {
        "mac": "4a0222000e31",
        "x": 51.0,
        "y": 29.0,
        "last_seen": 1480716946
    }
}