curl --request POST \
--url https://api.z-api.io/instances/{instanceId}/token/{token}/send-newsletter-admin-invite \
--header 'Client-Token: <api-key>' \
--header 'Content-Type: application/json' \
--data '
{
"phone": "<string>",
"adminInviteMessage": {
"newsletterId": "<string>",
"caption": "<string>"
}
}
'