| Name | Type | Description | Notes |
|---|---|---|---|
| id | string | Unique field identifier with field_ prefix | [optional] |
| name | string | Custom field name | [optional] |
| type | int | Field data type. Values: - `0` - Text (max 255 characters) - `1` - Number (integer or decimal) - `2` - Date (YYYY-MM-DD format) - `3` - Boolean (true/false) - `4` - Phone number (international format) | [optional] |
| description | string | Field description for documentation | [optional] |