A signature initiator creates and names a folder. Creating a folder is obligatory to upload files for singing. If the request has been successful, the **documentFolderId** is returned as a response.
Document folder name. The allowed signs are: A-Ź a-ź 0-9,.'!@#$%^&()-=_+ and space character.
redirectUrl is the address to which the signer will be redirected. After signing the document, a button appears in the upper right corner of the Portal.
