To ensure that your data is formatted properly in the JSON Lines text file format, see the JSON Lines Documentation.
1. From the Home page, in the navigation panel to the left, select Data Streams.
2. On the Data Streams page, in the top right corner, click the New Data icon to create a data stream.
3. In the New Data dialog that appears, under Local Upload, select JSON Lines File.
4. In the Connect to the Data Stream dialog that appears, provide a name for the data stream, then drag and drop or select your JSON Line file and click Submit.