code: public OvhTask serviceName_task_taskId_changeMaintenanceExecutionDate_POST(String serviceName, Long taskId, Date executionDate) throws IOException {
  		String qPath = "/dedicatedCloud/{serviceName}/task/{taskId}/changeMaintenanceExecutionDate";
  		StringBuilder sb = path(qPath, serviceName, taskId);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "executionDate", executionDate);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhTask.class);
  	}
docs: Change the execution date of a maintenance. Works only if task type is maintenance and if it has not started yet.
  
  REST: POST /dedicatedCloud/{serviceName}/task/{taskId}/changeMaintenanceExecutionDate
  @param executionDate [required] The new execution date
  @param serviceName [required] Domain of the service
  @param taskId [required] Task id