Ideally you’d set up a struct and use a data table. You can then easily organise data in an external spreadsheet and fetch a struct by name from the table directly. This would allow you to pack more data into the struct, in case you need to categorise it, for example.
Alternatively, you could try it like this, create an array first:
And then populate the Map:
Untested but could work OK. But this will use asset name rather than custom name you might’ve defined. Not sure where the Example string comes from - looks like an asset name.