curl --location --request PATCH '/public/api/v1/inboxes//contacts//conversations//messages/' \
--header 'Content-Type: application/json; charset=utf-8' \
--data-raw '{
"submitted_values": {}
}'
{
"id": "string",
"content": "string",
"message_type": "string",
"content_type": "string",
"content_attributes": "string",
"created_at": "string",
"conversation_id": "string",
"attachments": [
{}
],
"sender": {}
}