Read an array of arrays in json file when I run a collection postman

Question

I don't know what to write in the param value in the body using postman to read data from a json file, when the jsonfile has an array of arrays like you can see:

I have a json file with this information

In the request body I write that value for the array keyValue and SectionKeyValue

In the request body I sent that, What I should to write in the param to read an array of arrays? try to parse these object that you see in the picture:

thank you!