curl --request GET \
  --url https://api.shuriken.trade/api/v2/swap/approve/allowance \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "allowance": "<string>",
    "chainId": 1,
    "tokenAddress": "<string>",
    "walletAddress": "<string>"
  },
  "requestId": "<string>",
  "pagination": {
    "hasMore": true,
    "limit": 1,
    "page": 1,
    "total": 1
  }
}