Signals Notebook: Adding New Text elements to Experiments via API

To add a new Text element on an Experiment and write content to it via API, use 【POST】/entities/{eid}/children/{filename}. 

Example using Swagger:

1. Open the Experiment where you want to add a Text element and obtain the eid from the URL*1
2. Using an administrator account, navigate to "App Launcher > Signals Configuration > System Settings > API Key"
3. Click "Open External API Document" 
4. Expand "Entities" 
5. Expand "POST /entities/{eid}/children/{filename}" 
6. Click "Try it out" 
7. Enter the following parameters: 
   • eid: The eid obtained in Step 1 
   • Filename: Title of the Text element 
   • Force: true*2 
8. Set Request body to "text/plain" and enter the text string to be written in the Text element 
9. Click "Execute" 

Notes:
*1 When opening an Experiment, the URL will look like this:  "<tenant URL>/elements/entity/experiment:.....?focus=…"  
The eid is the portion from "experiment:" up to just before the "?"  
Example: If the URL shows "...entity/experiment:036f7f67-c82e-44d8-8041-09da9b2f2217?focus=...", then "experiment:036f7f67-c82e-44d8-8041-09da9b2f2217" is the eid 
*2 When setting a digest, do not set Force to True; instead, enter a value in the digest field.
* The administrator account used to open Swagger in Step 2 must have Write or Full Control permissions for the Experiment opened in Step 1.