Get loyalty balance

{
  "data": {
    "id": "e89b1330fc391ec89656f3c664318cff8805471e",
    "type": "pass",
    "attributes": {
      "barcode": {
        "value": "123abcd"
      },
      "passDesign": {
        "backgroundColor": "#EFEFEF",
        "labelColor": "#EFEFEF",
        "textColor": "#EFEFEF"
      },
      "locations": [
        {
          "name": "West Entrance",
          "latitude": 51.54321132456805,
          "longitude": -0.022901231803803924,
          "radius": 90,
          "message": "Welcome! Enjoy the show!",
          "address": "Mick's Garage, Queens Yard, London, England, E9 5EN, United Kingdom"
        }
      ],
      "beacons": [
        {
          "proximityUuid": "E2C56DB5-DFFB-48D2-B060-D0F5A71096E0",
          "major": 65535,
          "minor": 8525,
          "message": "You're near my store",
          "name": "West Entrance"
        }
      ],
      "enhancedData": {
        "eventTicket": {
          "event": {
            "name": "PassEntry Christmas Party",
            "startDateTime": "2026-12-10T18:00:00Z",
            "endDateTime": "2026-12-10T22:00:00Z"
          },
          "venue": {
            "name": "Fulham Green",
            "region": "London",
            "location": {
              "latitude": 51.468532,
              "longitude": -0.210611
            },
            "contactPhoneNumber": "+447400123456",
            "contactEmailAddress": "venue@passentry.com",
            "websiteUrl": "https://www.example.com"
          },
          "seat": {
            "number": "7",
            "row": "H",
            "section": "312",
            "gate": "26"
          },
          "eventGuide": {
            "venueOpenDateTime": "2026-12-10T17:00:00Z",
            "venueCloseDateTime": "2026-12-10T22:00:00Z"
          }
        },
        "generic": {
          "featuredActions": {
            "one": {
              "type": "viewSchedule",
              "url": "https://www.example.com/schedule"
            },
            "two": {
              "type": "viewSchedule",
              "url": "https://www.example.com/schedule"
            }
          }
        }
      }
    }
  }
}