{
  "type": "object",
  "description": "A list membership record.",
  "properties": {
    "recordId": {
      "type": "string",
      "description": "The ID of the CRM record that is a member of the list.",
      "example": "500123"
    },
    "addedAt": {
      "type": "string",
      "description": "The date and time the record was added to the list.",
      "format": "date-time",
      "example": "2025-03-15T14:30:00Z"
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Membership"
}