| Name | Type | Description | Notes |
|---|---|---|---|
| subject | String | the resource instance assigned the new relation (accepts either the resource instance id or resource_key:resource_instance_key) | |
| relation | String | the relation to assign between the subject and object | |
| object | String | the resource instance on which the new relation is assigned (accepts either the resource instance id or resource_key:resource_instance_key) |