Help with a custom column

Hi v-deddai1-msft 

Seeing that it is in a dictionary data format, PowerBI interprets each key as a new column. That is why we want to use a specific key - provided by the LatestContfigurationId - to extract only one record and allow PowerBI to ignore the rest. The value/record associated to these keys can be seen in the screenshot above. 

We are able to make this work manually by providing a hard-coded key ourselves (see earlier screenshot), but this only works for the one row. We are looking to dynamically reference this value - provided by the LatestConfigurationId - so that it works for every row (see above M code).