curl --request POST \
  --url https://nexus-dev.gerowallet.io/v1/transactions/utxos \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
[
  {
    "txHash": "8f83b73e8e7f4b7d8f9c2e8f83b73e8e7f4b7d8f9c2e8f83b73e8e7f4b7d8f9c",
    "outputIndex": 0
  }
]
'

{
  "collateral": true,
  "reference": true,
  "tx_hash": "<string>",
  "output_index": 123,
  "owner_addr": "<string>",
  "owner_stake_addr": "<string>",
  "owner_payment_credential": "<string>",
  "owner_stake_credential": "<string>",
  "amounts": [
    {
      "unit": "<string>",
      "quantity": "<string>",
      "policy_id": "<string>",
      "asset_name": "<string>"
    }
  ],
  "lovelace_amount": 123,
  "data_hash": "<string>",
  "inline_datum": "<string>",
  "inline_datum_json": {},
  "reference_script_hash": "<string>",
  "script_ref": "<string>",
  "block_number": 123,
  "block_time": 123,
  "slot": 123,
  "block_hash": "<string>",
  "epoch": 123,
  "consumed_by_tx": "<string>",
  "is_collateral_return": true
}