curl --request POST \
  --url https://api.walletsuite.io/api/txs/prepare-sign \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "chain": "<string>",
  "from": "<string>",
  "to": "<string>",
  "txType": "TRANSFER_NATIVE",
  "amountWei": 123,
  "amount": "<string>",
  "symbol": "<string>",
  "tokenContract": "<string>",
  "nonce": 123,
  "maxPriorityFeePerGasWei": 123,
  "priorityFeeMultiplier": 123
}
'

{
  "ok": true,
  "code": "<string>",
  "message": "<string>",
  "data": {
    "chain": "<string>",
    "from": "<string>",
    "to": "<string>",
    "valueWei": 123,
    "txType": "TRANSFER_NATIVE",
    "fee": {
      "mode": "EIP1559",
      "gasLimit": 123,
      "baseFeePerGas": 123,
      "maxPriorityFeePerGas": 123,
      "maxFeePerGas": 123,
      "gasPrice": 123,
      "el": 123,
      "rp": {
        "h": "<string>",
        "n": 123,
        "t": 123,
        "v": 123,
        "p": "<string>",
        "r": "<string>",
        "w": "<string>"
      }
    },
    "chainId": 123,
    "data": "<string>",
    "tokenContract": "<string>",
    "nonce": 123
  }
}