Creating Types from JSON
1 Select CREATE DATATYPES/INTEGRATION in a Designer Project from the top action bar.
2 In the Create DataTypes/Integration window, select XML/JSON/CSV from the right column, then select Create Types from JSON.
3 From here, the Edit JSON Structure page will appear. Below is a table that covers the input fields for the new datatype.
4 Once the structure is configured correctly, click Save Structure. A new Simple Flow structure will be created with the Json Structure Name.
from: https://documentation.decisions.com/v9/docs/creating-from-json