curl --request GET \
  --url https://staging.crossmint.com/api/2025-06-09/wallets/{walletLocator}/signatures/{signatureId} \
  --header 'X-API-KEY: <x-api-key>'

{
  "id": "<string>",
  "params": {
    "message": "<string>",
    "signer": {
      "type": "external-wallet",
      "address": "<string>",
      "locator": "<string>"
    }
  },
  "approvals": {
    "pending": [
      {
        "signer": {
          "type": "external-wallet",
          "address": "<string>",
          "locator": "<string>"
        },
        "message": "<string>"
      }
    ],
    "submitted": [
      {
        "signature": "<string>",
        "submittedAt": 123,
        "signer": {
          "type": "external-wallet",
          "address": "<string>",
          "locator": "<string>"
        },
        "message": "<string>",
        "metadata": {
          "deviceInfo": "<string>",
          "ipAddress": "<string>",
          "userAgent": "<string>"
        }
      }
    ],
    "required": 123
  },
  "createdAt": 123,
  "completedAt": 123,
  "error": "<unknown>",
  "outputSignature": "<string>"
}