How do I go about converting this data into a choropleth world map?

Question

I have a dynamically generated object with shape:

{ Hungary: 10, Iceland: 16, Israel: 5, ...}

How do I go about converting this data into a choropleth world map?

I have tried react-simple-maps but it uses an extremely large json as the data source and there's no documentation for a simple mapping from a countries count object.