Unfortunately this is not true. The id received is the job id most probably, and not the id of the server to be created. 

I've just sent a request to create a server, response from NephoScale is:

{u'subcode': 0, u'data': {u'id': 22091, u'resource_type': u'/cloud/initiator', u'uri': u'https://api.nephoscale.com/cloud/initiator/22091/'}, u'message': u'Your request was processed successfully.', u'success': True, u'response': 202}

Then after a few minutes the server is created, it has the id: 89061