1. Make sure you have Image Asset File for the main image, public URL for the app icon and Tracker Asset as they are required.
2. Create Creative by using Create Creative API.

Relevant parameters

Following are the parameters to use with Create Creative API specific to Native creative:

• mobile_object_idof the advertised App
• title
• type: must be native
• description
• asset_file_idof the main image
• call_to_action
• rating
• icon_url