As a marketer, I can define segment rules with model entities using a selector

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: Segments Editor
• Labels: None
• Epic/Theme:
  • Segmentation
• Epic Link: Segment authenticated users by related entities
• Sprint: SP | Sprint 5 | Jan4 - Jan18, SP | Sprint 6 | Jan21 - Feb1

When defining a segment rule based on model entity fields (e.g. user Id, organization Id, group Id), the user should see a select button that opens a select view with a list of the available entities.