curl --request POST \
  --url https://ecsend.paysgator.com/contacts/books \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "name": "My Contacts",
  "description": "Personal contact list"
}
'

{
  "success": true,
  "name": "My Contacts"
}