curl --request POST \
  --url https://api.example.com/api/v1/onchain/send-many \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "destinations": [
    "<string>"
  ],
  "immediate": true
}
'

{
  "txid": "<string>"
}