curl --request POST \
  --url https://{host}/Agent/Xmpp/SendSubscriptionAccepted \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "to": "<string>",
  "id": "<string>"
}
'

{
  "sent": true,
  "id": "<string>",
  "RosterItem": {
    "bareJid": "<string>",
    "pendingSubscription": true,
    "status": "<string>",
    "name": "<string>",
    "Groups": [
      "<string>"
    ]
  }
}