curl --request POST \
  --url https://nexus.gerowallet.io/api/midnight/{network}/tx/build-unshielded \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fromAddress": "<string>",
  "publicKeyHex": "<string>",
  "addressHex": "<string>",
  "outputs": [
    {
      "address": "<string>",
      "amount": "<string>",
      "token": "<string>"
    }
  ],
  "ttlMs": 123
}
'

{
  "unprovenTxHex": "<string>",
  "txHash": "<string>",
  "segmentsToSign": [
    {
      "index": 123,
      "dataHex": "<string>"
    }
  ]
}