curl --request POST \
  --url https://grid.squads.xyz/api/grid/v1/accounts/{address}/transactions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-grid-environment: <x-grid-environment>' \
  --data '{
  "fee_config": null,
  "payer_address": "<string>",
  "transaction": "<string>",
  "transaction_signers": [
    "<string>"
  ]
}'

{
  "data": {
    "fee": null,
    "kms_payloads": [
      {
        "address": "<string>",
        "payload": "<string>",
        "provider": "privy"
      }
    ],
    "simulation_logs": [
      "<string>"
    ],
    "transaction": "<string>",
    "transaction_signers": [
      "<string>"
    ]
  },
  "metadata": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z"
  }
}