curl --request DELETE \
  --url https://api.example.com/admin/v1/item-graph/mentions \
  --header 'Content-Type: application/json' \
  --data '
{
  "ids": [
    123
  ]
}
'

{
  "data": {
    "deletedCount": 123,
    "affectedMemoryIds": [
      "<string>"
    ]
  }
}