Upserts a data extension row by key.
|key||string||Required||Data extension external key, included in URL as key:your external key value here. Required if an ID is not provided.|
|id||string||Required||Data extension ID, included in URL as id:your ID value here or just the ID. Required if a key is not provided.|
|primaryKeys||array||Key/Value pair of the primary key(s) for the row|
|values||object||Column name and value data set for the row being inserted into the data extension|
If the request was not valid, the API returns a 400 response with details on the error.