Use pgaudit to generate an audit trail. Upgrade to PostgreSQL 9.5 because it is a requirement for pgaudit. pgaudit/analyze can be used to transfer the audit trail into the database, but it seems to be easy to do this with pgaudit directly with some changes to the code.

{
    "datensatzErzeugerId": "07",
    "letzteAenderung": 1381413048800,
    "mstId": "06010",
    "bezeichnung": "Test 1",
    "netzbetreiberId": "06"
}