curl --request POST \
  --url https://grid.squads.xyz/api/grid/v1/accounts/{address}/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-grid-environment: <x-grid-environment>' \
  --data '
{
  "transaction": "<string>",
  "kms_payloads": [
    {
      "provider": "privy",
      "kms_signed_payload": "<unknown>",
      "signature": "<string>"
    }
  ]
}
'

{
  "data": {
    "confirmed_at": "2023-11-07T05:31:56Z",
    "transaction_signature": "<string>"
  },
  "metadata": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z"
  }
}