Datasets - Execute Queries with filtering on a string

Dear all,

how do I filter a DAX statement with Power BI REST API (Execute Queries), when the filter is a string value?

Something like this works

FILTER ('table', 'table'[column] = FIRSTNONBLANK('table'[column], 'table'[column]))

Something like this does not (and this is what I want to make work).

I guess, it is only about formating, since the " related to the filter value are understood as end of the JSON value from the PowerBI REST API

FILTER ('table', 'table'[columnArea] = "value")

Thanks for any support!