post https://elastic.messangi.me/qarth/v3/lists//subscribers
The second step is adding new subscribers to the list created via JSON body or importing a CSV file.
To add subscribers to a specific list, you need to provide the unique identifier of the list you want to add the new subscribers to.
NOTE
Before adding subscribers, you must create a list previously.
To know how to add subscribers to a single list , go to the Manage Subscribers section.