Add attachment as url (deep link to Project Overview page) in Project Status change workflow

Summary

We have a scenario where we need to add project overview page as url attachment to Project status change workflow notification.

Content

We have a scenario where we need to add project overview page as url attachment to Project status change workflow notification. I tried using the BPM api /bpm/api/4.0/tasks/{task Id}/attachments/  but its failing and not allowing to add any attachment.

 

Version

/bpm/api/4.0/tasks/{task Id}/attachments/

Code Snippet

/bpm/api/4.0/tasks/{task Id}/attachments/ 
payload
{
"title": "Project Details",
"rel": "self",
"attachmentScope": "PARENT_TASK",
"attachmentSize": 0,
"uri": {
"rel": "rel",
"href": "https://<host>/fscmUI/faces/deeplink?objType=PROJECT&objKey=ProjectId%3D300000772846457&action=NONE",
"length": 0
}
}