List employment statuses

{  "data": [    {      "id": 0,      "effective_from": "2019-08-24",      "comment": "string",      "fields": {        "property1": "string",        "property2": "string"      },      "employment_type": {        "id": 0,        "name": "string"      },      "working_pattern": {        "id": 0,        "name": "string"      },      "probation_policy": {        "id": 0,        "name": "string"      }    }  ]}