curl -i -X POST "https://api.box.com/2.0/workflows/42037322/start" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -d '{
       "type": "workflow_parameters",
       "flow": {
        "id": "8937625",
        "type": "flow"
       },
       "files": [{
          "type": "file",
          "id": "389047572"
        },
        {
          "type": "file",
          "id": "389047578"
        }],
       "folder": {
         "id": "2233212",
         "type": "folder"
       },
       "outcomes": [
          {
            "id": "34895783",
            "type": "outcome",
            "task_collaborators": {
                "type": "variable",
                "variable_type": "user_list",
                "variable_value": [{ "type": "user", "id": "890273642" }]
            },
            "completion_rule": {
                "type": "variable",
                "variable_type": "task_completion_rule",
                "variable_value": "all_assignees"
            },
            "file_collaborator_role": {
                "type": "variable",
                "variable_type": "collaborator_role",
                "variable_value": "viewer"
            }
          }
        ]
     }'

admin_client.workflows.start_workflow(
    workflow_to_run.id,
    StartWorkflowFlow(type="flow", id=workflow_to_run.flows[0].id),
    [StartWorkflowFiles(type=StartWorkflowFilesTypeField.FILE, id=workflow_file_id)],
    StartWorkflowFolder(
        type=StartWorkflowFolderTypeField.FOLDER, id=workflow_folder_id
    ),
    type=StartWorkflowType.WORKFLOW_PARAMETERS,
)

await adminClient.workflows.startWorkflow(workflowToRun.id!, {
  type: 'workflow_parameters' as StartWorkflowRequestBodyTypeField,
  flow: {
    type: 'flow',
    id: workflowToRun.flows![0].id!,
  } satisfies StartWorkflowRequestBodyFlowField,
  files: [
    {
      type: 'file' as StartWorkflowRequestBodyFilesTypeField,
      id: workflowFileId,
    } satisfies StartWorkflowRequestBodyFilesField,
  ],
  folder: {
    type: 'folder' as StartWorkflowRequestBodyFolderTypeField,
    id: workflowFolderId,
  } satisfies StartWorkflowRequestBodyFolderField,
} satisfies StartWorkflowRequestBody);

try await adminClient.workflows.startWorkflow(workflowId: workflowToRun.id!, requestBody: StartWorkflowRequestBody(type: StartWorkflowRequestBodyTypeField.workflowParameters, flow: StartWorkflowRequestBodyFlowField(type: "flow", id: workflowToRun.flows![0].id!), files: [StartWorkflowRequestBodyFilesField(type: StartWorkflowRequestBodyFilesTypeField.file, id: workflowFileId)], folder: StartWorkflowRequestBodyFolderField(type: StartWorkflowRequestBodyFolderTypeField.folder, id: workflowFolderId)))

adminClient.getWorkflows().startWorkflow(workflowToRun.getId(), new StartWorkflowRequestBody.Builder(new StartWorkflowRequestBodyFlowField.Builder().type("flow").id(workflowToRun.getFlows().get(0).getId()).build(), Arrays.asList(new StartWorkflowRequestBodyFilesField.Builder().type(StartWorkflowRequestBodyFilesTypeField.FILE).id(workflowFileId).build()), new StartWorkflowRequestBodyFolderField.Builder().type(StartWorkflowRequestBodyFolderTypeField.FOLDER).id(workflowFolderId).build()).type(StartWorkflowRequestBodyTypeField.WORKFLOW_PARAMETERS).build())

await adminClient.Workflows.StartWorkflowAsync(workflowId: NullableUtils.Unwrap(workflowToRun.Id), requestBody: new StartWorkflowRequestBody(flow: new StartWorkflowRequestBodyFlowField() { Type = "flow", Id = NullableUtils.Unwrap(NullableUtils.Unwrap(workflowToRun.Flows)[0].Id) }, files: Array.AsReadOnly(new [] {new StartWorkflowRequestBodyFilesField() { Type = StartWorkflowRequestBodyFilesTypeField.File, Id = workflowFileId }}), folder: new StartWorkflowRequestBodyFolderField() { Type = StartWorkflowRequestBodyFolderTypeField.Folder, Id = workflowFolderId }) { Type = StartWorkflowRequestBodyTypeField.WorkflowParameters });

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}