{"valid":false,"reason":"APP_NOT_FOUND","message":"Unknown App ID. Copy App ID exactly as shown in dashboard.","parts":{"internalUserId":"User123","appId":"1sJ57hgit","checksum":"83a1985e1a7f54dbb9af92c3ab466dcd"},"docs":"https://docs.rapidoreach.com/docs/sdk/UIDTroubleshooting"}