An episode is created at version 1.
POST
{ "type": "episode.created", "timestamp": "2019-08-24T14:15:22Z", "attemptedAt": "2019-08-24T14:15:22Z", "webhookEventId": "string", "webhookId": "string", "projectId": "string", "episode": { "id": "string", "version": 1, "changedFields": [ … ] } }