# WebhookPayloadContactFieldChanged
## Properties
**id** | **String** | Event id, the dedupe key. |
**event** | **Event** | (enum: contact.field_changed) |
**timestamp** | **String** | |
**contact** | [**models::WebhookPayloadContactTagContact**](WebhookPayloadContactTagContact.md) | |
**field** | **String** | Custom field slug. |
**previous_value** | Option<**serde_json::Value**> | |
**value** | Option<**serde_json::Value**> | |
**source** | **Source** | Who wrote the field: the API or dashboard, a workflow set_field node, or an automation. (enum: api, workflow, automation) |
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