curl --request POST \
  --url https://api.reply.io/v4/sequences/{id}/contact-links/bulk-delete \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "contactIds": [
    123
  ]
}
'

{
  "requested": 123,
  "removed": 123,
  "notFound": 123,
  "notInSequence": 123,
  "removedIds": [
    123
  ]
}