{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://raw.githubusercontent.com/api-evangelist/hubspot/refs/heads/main/json-schema/engagement-notes-property-history-schema.json", "title": "PropertyHistory", "description": "Historical value of a property", "type": "object", "properties": { "value": { "type": "string", "description": "The historical value", "example": "Initial meeting notes" }, "timestamp": { "type": "string", "format": "date-time", "description": "When the value was set", "example": "2024-01-15T10:30:00.000Z" }, "sourceType": { "type": "string", "description": "The source type that set this value", "example": "CRM_UI" }, "sourceId": { "type": "string", "description": "The source identifier", "example": "userId:12345" }, "sourceLabel": { "type": "string", "description": "Human-readable source label", "example": "John Doe" }, "updatedByUserId": { "type": "integer", "description": "The user ID who made the change", "example": 12345 } } }