How to create new Project Role via API request Follow

Hi there

is there a way to create a Project Role with the apI?

I can grant a Role ro a Project inside a group in the GUI

  Groups > my group > roles > grant role

is there a way to do this via api request?

I can add Project Roles to a Group with

POST <REST API URL>/usergroups/{user group id}/projectroles

 {

  "id": string,

  "aliasIds": [string, ...],

  "aliases": [alias, ...],

  "role": role,

  "project": project,

  "owner": authorityHolder,

  "teamMember": boolean

}

but i need the id Project Role and i see no way in the docs to create a new Project Role