App ID of the app for which you are passing data

Create an HMAC signature by concatenating the values of the following fields:

timestamp + ip

The HMAC is generated using SHA256 and uses the DevKey as the signature’s secret key.
To retrieve the DevKey, in the AppsFlyer dashboard, go Configuration > App Settings.

For example, the concatenation of the timestamp and IP are:

2015-01-22T08:45:33.412127.0.0.1

The DevKey is w8sZzy8EaPaxFKfaoTqUi6

Note: Make sure you put the timestamp first, and then the IP.

Device locale used for authentication and probabilistic modeling

Is first app launch

App from which the current app was opened

The device IP Address - IPv4

Device OS version used for authentication and probabilistic modeling

ISO 8601 UTC format

Device type/model used for authentication and probabilistic modeling

An identifier that is unique per app install.
SDK should send the AppsFlyer ID in this field.
SDKless should send the same value sent in the install event’s uid field.