Create a new Stack or add assets to an existing Stack

The <a href= "https://developer.orangelogic.com/reference/assets#unique-identifiers">Unique ID</a> of the lead asset.

The <a href= "https://developer.orangelogic.com/reference/assets#unique-identifiers">Unique IDs</a> of new alternative versions to relate to the lead asset, separated by commas.