Conversation item created subscribe example:

curl --location --request POST '/platform/v1/webhook/subscribe' \
--header 'Authorization: "Bearer API_TOKEN"'\
--header 'Content-Type: application/json' \
--data-raw '{
"event": "conversation_item/created",
"target_url": "URL"
}'

Conversation item created payload example:

{
  "entity_name": "conversation_item",
  "event_type": "created",
  "data": {
    "uid": "elcq4ub0kzlzvrlz",
    "conversation_uid": "6u6pohktybhlprzg",
    "contact_uid": "n2nekjezdsv21v3x",
    "business_uid": "k1pjwutt3mtlt5ft",
    "staff_uid": "b7ojv3uv19t6173r",
    "message_type": "text",
    "direction": "business_to_client",
    "text": "&lt;div&gt;&lt;strong&gt;asdfsdf&lt;/strong&gt;&lt;/div&gt;",
    "message_category": null,
    "message_entity_uid": null,
    "created_at": "2023-05-23T03:17:04.000-04:00",
    "external_message_id": null,
    "channel_uid": "dujrmr24hpmerwkr"
  }
}