This support article explains how to reassign match action to the correct person via API using Postman or any other API management system.
If you noticed mistakes in a match actions you can fix them via API which has write/read permissions.
1. First use GET call to get all the match actions in a match https://developer.geniussports.com/warehouse/rest/index_basketball.html#method_GETmatchactionList_anchor - use limit=500 since there should be more than 10 match action which comes by default.
2. Look for the match action or actions which you want to edit. For example "actionNumber": 9.
3. To update match action number 9 use PUT call
The call must contain matchId, actionNumber and a body with correct person id (example "personId":12345)
4. After match action is updated run Match Statistics Rebuild from Actions https://developer.geniussports.com/warehouse/rest/index_basketball.html#method_POSTBuildMatchStatsFromPBP_anchor to update match statistics for players.