curl --request PATCH \
  --url https://api.perscom.io/{version}/users/{user}/attachments/toggle \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "resources": [
    {}
  ]
}
'

{
  "attached": [
    123
  ],
  "detached": [
    123
  ]
}