code: def create_submission(wnamespace, workspace, cnamespace, config,
                        entity, etype, expression=None, use_callcache=True):
      
  
      uri = "workspaces/{0}/{1}/submissions".format(wnamespace, workspace)
      body = {
          "methodConfigurationNamespace" : cnamespace,
          "methodConfigurationName" : config,
           "entityType" : etype,
           "entityName" : entity,
           "useCallCache" : use_callcache
      }
  
      if expression:
          body['expression'] = expression
  
      return __post(uri, json=body)
docs: Submit job in FireCloud workspace.
  
      Args:
          namespace (str): project to which workspace belongs
          workspace (str): Workspace name
          cnamespace (str): Method configuration namespace
          config (str): Method configuration name
          entity (str): Entity to submit job on. Should be the same type as
              the root entity type of the method config, unless an
              expression is used
          etype (str): Entity type of root_entity
          expression (str): Instead of using entity as the root entity,
              evaluate the root entity from this expression.
          use_callcache (bool): use call cache if applicable (default: true)
  
      Swagger:
          https://api.firecloud.org/#!/Submissions/createSubmission