curl --request POST \
  --url https://api.hubapi.com/crm/v3/extensions/calling/{appId}/settings/channel-connection \
  --header 'Content-Type: application/json' \
  --data '{
  "isReady": true,
  "url": "<string>"
}'

{
  "createdAt": "2023-11-07T05:31:56Z",
  "isReady": true,
  "url": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z"
}