This is an event.
Channel: uk/nhs/notify/digital/letters/viewer/digital/letter/read/v1
Content Type: application/cloudevents+json
Event Type: Received
Data Schema Reference: /schemas/digital-letters/2025-10-draft/data/digital-letters-digital-letter-read-data.schema.json
Schema Reference: /schemas/digital-letters/2025-10-draft/events/uk.nhs.notify.digital.letters.viewer.digital.letter.read.v1.schema.json