curl -X POST 'https://api.sendforsign.com/api/contract' \
     -H 'X-Sendforsign-Key: YOUR_API_KEY' \
     -H 'Content-Type: application/json' \
     -d '{ 
		  "data": {
				   "action": "update",
				   "clientKey": "YOUR_CLIENT_KEY",
				   "contract": {
							  "contractKey": "CONTRACT_KEY", 
							  "name": "New contract",
							  "value": "<p>Contract text</p>"
						     }
				  }
       }'

	{
       "contract": {
                "createTime": "2023-12-01 12:18:55",
                "changeTime": "2023-12-01 12:18:55",
                "contractKey": "CONTRACT_KEY", 
		},
       "code": "201",
       "message": "Contract updated"
    }