A Google Pub\Sub interface to tracking data. Does the same thing as /track except
            it consumes a message in the format that Pub\Sub uses.

Pass the input in single entry format or a multiple entry format.

• Set single key if you're passing a single data point with multiple features
• Set multiple key if you're passing multiple data at once. The multiple format is is compatible with Pandas JSON output:

  import pandas as pd
  cars = {'Brand': ['Honda Civic','Toyota Corolla','Ford Focus','Audi A4'],
        'Price': [22000,25000,27000,35000] }
  df = pd.DataFrame(cars, columns = ['Brand', 'Price'])
  df.to_json(orient="split") # this is the value of `multiple`

  Here is an example from the output above

  {
    "datasetId": "demo-model",
    "timestamp": 1648162494947,
    "tags": {
        "tag1": "value1"
    },
    "multiple": {
        "columns": [
            "Brand",
            "Price"
        ],
        "data": [
            [ "Honda Civic", 22000 ],
            [ "Toyota Corolla", 25000 ],
            [ "Ford Focus", 27000 ],
            [ "Audi A4", 35000 ]
        ]
    }
  }