This endpoint allows you to update existing entries and insert new entries into the Data Collection in a single operation.
The collection_data array sent to this endpoint should contain objects of the form {'value': <string>} or {'value': <string>, 'description': <string or null>}.
If the string at 'value' is not present in the Data Collection, the string will be added to the collection. Its description will be the string at the 'description' key if that key is present, or "" if that key is not present or contains null.
The behavior is similar if the string at the 'value' key is present. If a 'description' key is present and contains a string, the entry's description will be updated to contain that string. If a 'description' key is absent or contains null, the entry's description will be unchanged.