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.

EXAMPLE:

{
    "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:

eyJ0b2tlbiI6ICJQVUJMSUNfS0VZIiwicHJvcGVydGllcyI6IHsiJGVtYWlsIjogImFicmFoYW0ubGluY29sbkBrbGF2aXlvLmNvbSIsIiRmaXJzdF9uYW1lIjogIkFicmFoYW0iLCIkbGFzdF9uYW1lIjogIkxpbmNvbG4iLCIkY2l0eSI6ICJTcHJpbmdmaWVsZCIsIiRyZWdpb24iOiAiSWxsaW5vaXMifX0K

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