I am trying to manage the data sources and entities for my account, but I don't see a Data Sources option in my Quantive Results Account.

To manage data sources (add, delete, sync, check status etc.), entities (create, delete, preview etc.) and connections (create, edit, delete) in your Quantive Results account, your role must include the "Manage Data" permission.

You can either create a new role that contains the "Manage data" permission for your user role or get the system role admin or data that are available in Quantive Results by default.