To crreate, update or delete administrative fields, use the command item/update_admin_field:
svc=item/update_admin_field¶ms={"itemId":<long>, "id":<long>, "callMode":<text>, "n":<text>, "v":<text>}
| Name | Description | 
|---|---|
| itemId | item ID | 
| id | administrative field ID (not taken into account when creating; IDs for new administrative fields are generated by the system) | 
| callMode | action: create, update, delete | 
| Optional parameters (required for create and update) | |
| n | administrative field name | 
| v | administrative field value | 
When creating or updating administrative fields, response format will be:
[ <long>, /* administrative field ID */ { "id":<long>, /* administrative field ID */ "n":<text>, /* name */ "v":<text> /* value */ } ]
When deleting:
[ <long>, /* administrative field ID */ null ]