curl --request GET \
  --url http://localhost/api/v2/arbitrum/messages/withdrawals/{transaction_hash}

{
  "items": [
    {
      "arb_block_number": 1,
      "caller_address_hash": "<string>",
      "callvalue": "<string>",
      "completion_transaction_hash": "<string>",
      "data": "<string>",
      "destination_address_hash": "<string>",
      "eth_block_number": 1,
      "id": 1,
      "l2_timestamp": 1,
      "token": {
        "address_hash": "<string>",
        "amount": "<string>",
        "decimals": 1,
        "destination_address_hash": "<string>",
        "name": "<string>",
        "symbol": "<string>"
      }
    }
  ]
}