This endpoint is also used to identify a profile and update its properties without an associated event. It takes as input the same payload as the above POST request, but as a base64-encoded string passed as a query parameter. NOTE: This is offered for backwards compatibility; we recommend all new implementations use the POST approach above.


    "token": "PUBLIC_KEY",
    "properties": {
      "$email": "[email protected]",
      "$first_name": "Abraham",
      "$last_name": "Lincoln",
      "$city": "Springfield",
      "$region": "Illinois"

Gets encoded into the following string, which is passed into the data parameter: