List Extract Template Versions

{  "items": [    {      "created_at": "2019-08-24T14:15:22Z",      "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",      "input_schema": {},      "metadata": {        "data_source": "string",        "description": "string",        "display_name": "string",        "domain": "string",        "entity_type": "string",        "tags": [          "string"        ],        "vertical": "string"      },      "name": "string",      "output_schema": {},      "samples": [        {          "input": null,          "output": null        }      ],      "version_number": 0    }  ],  "limit": 0,  "offset": 0,  "total": 0}