curl --request POST \
  --url https://api.anchorage-staging.com/v3/wallet-operations/create/propose-raw-transaction \
  --header 'Api-Access-Key: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "parameters": {
    "domain": {},
    "message": {},
    "primaryType": "Permit",
    "type": "EIP712_ETH_SIGNTYPEDDATA_V4",
    "types": {}
  },
  "sourceWalletId": "<string>",
  "idempotencyKey": "e763a50d-aa82-4ec7-b5a3-89ad0462d248"
}
'

import requests

url = "https://api.anchorage-staging.com/v3/wallet-operations/create/propose-raw-transaction"

payload = {
    "parameters": {
        "domain": {},
        "message": {},
        "primaryType": "Permit",
        "type": "EIP712_ETH_SIGNTYPEDDATA_V4",
        "types": {}
    },
    "sourceWalletId": "<string>",
    "idempotencyKey": "e763a50d-aa82-4ec7-b5a3-89ad0462d248"
}
headers = {
    "Api-Access-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Api-Access-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    parameters: {
      domain: {},
      message: {},
      primaryType: 'Permit',
      type: 'EIP712_ETH_SIGNTYPEDDATA_V4',
      types: {}
    },
    sourceWalletId: '<string>',
    idempotencyKey: 'e763a50d-aa82-4ec7-b5a3-89ad0462d248'
  })
};

fetch('https://api.anchorage-staging.com/v3/wallet-operations/create/propose-raw-transaction', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "walletOperationId": "op_550e8400-e29b-41d4-a716-446655440000"
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}