Use PutEvents with an Amazon SDK or CLI

        public static int putItems(PersonalizeEventsClient personalizeEventsClient,
                        String datasetArn,
                        String item1Id,
                        String item1PropertyName,
                        String item1PropertyValue,
                        String item2Id,
                        String item2PropertyName,
                        String item2PropertyValue) {

                int responseCode = 0;
                ArrayList<Item> items = new ArrayList<>();

                try {
                        Item item1 = Item.builder()
                                        .itemId(item1Id)
                                        .properties(String.format("{\"%1$s\": \"%2$s\"}",
                                                        item1PropertyName, item1PropertyValue))
                                        .build();

                        items.add(item1);

                        Item item2 = Item.builder()
                                        .itemId(item2Id)
                                        .properties(String.format("{\"%1$s\": \"%2$s\"}",
                                                        item2PropertyName, item2PropertyValue))
                                        .build();

                        items.add(item2);

                        PutItemsRequest putItemsRequest = PutItemsRequest.builder()
                                        .datasetArn(datasetArn)
                                        .items(items)
                                        .build();

                        responseCode = personalizeEventsClient.putItems(putItemsRequest).sdkHttpResponse().statusCode();
                        System.out.println("Response code: " + responseCode);
                        return responseCode;

                } catch (PersonalizeEventsException e) {
                        System.out.println(e.awsErrorDetails().errorMessage());
                }
                return responseCode;
        }

// Get service clients module and commands using ES6 syntax.
import { PutEventsCommand } from "@aws-sdk/client-personalize-events";
import { personalizeEventsClient } from "./libs/personalizeClients.js";
// Or, create the client here.
// const personalizeEventsClient = new PersonalizeEventsClient({ region: "REGION"});

// Convert your UNIX timestamp to a Date.
const sentAtDate = new Date(1613443801 * 1000); // 1613443801 is a testing value. Replace it with your sentAt timestamp in UNIX format.

// Set put events parameters.
var putEventsParam = {
  eventList: [
    /* required */
    {
      eventType: "EVENT_TYPE" /* required */,
      sentAt: sentAtDate /* required, must be a Date with js */,
      eventId: "EVENT_ID" /* optional */,
      itemId: "ITEM_ID" /* optional */,
    },
  ],
  sessionId: "SESSION_ID" /* required */,
  trackingId: "TRACKING_ID" /* required */,
  userId: "USER_ID" /* required */,
};
export const run = async () => {
  try {
    const response = await personalizeEventsClient.send(
      new PutEventsCommand(putEventsParam),
    );
    console.log("Success!", response);
    return response; // For unit tests.
  } catch (err) {
    console.log("Error", err);
  }
};
run();