When describing data, you really need to give details, such as which (relevant) fields are available, a general idea about values of these fields; it is perhaps easier to illustrate samples (anonymize as needed).  By describing logic, I mean how do you deduce change type and who changed the account from such data, etc. (Sometimes logic can be obvious from sample data, sometimes not, all depending on characteristics of actual data.) If you have a specific presentation format in mind, it is best to illustrate, too. (None of these are obvious from your question.) ... View more