Create spot proposal

curl --request POST \
  --url https://api.alpha-labs.trade/api/v1/spot/proposals \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "groupId": "1a9d212a-de67-45f4-88f5-6e9f41e78dc0",
  "contractAddress": "DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263",
  "reason": "Momentum breakout",
  "amountUsd": "50.00"
}
'

{
  "data": {
    "proposal": {
      "id": "<string>",
      "groupId": "<string>",
      "createdByUserDynamicId": "<string>",
      "tokenMetadataId": "<string>",
      "reason": "<string>",
      "initialPriceUsd": "12.50",
      "exitPriceUsd": "12.50",
      "exitPnlPct": "4.27",
      "exitPnlUsd": "12.50",
      "closedAt": "2023-11-07T05:31:56Z",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "token": {
        "id": "<string>",
        "contractAddress": "<string>",
        "symbol": "<string>",
        "name": "<string>",
        "logoUrl": "<string>",
        "coingeckoId": "<string>",
        "verified": true
      },
      "group": {
        "uniqueId": "<string>",
        "name": "<string>",
        "image": "<string>"
      },
      "createdBy": {
        "dynamicId": "<string>",
        "username": "<string>"
      },
      "trades": [
        {
          "id": "<string>",
          "tradingProposalId": "<string>",
          "groupId": "<string>",
          "walletAddress": "<string>",
          "tokenAmount": "4.27",
          "tokenDecimals": 123,
          "pricePerTokenUsd": "12.50",
          "totalCostUsd": "12.50",
          "alphaFeeUsd": "12.50",
          "pnlPct": "4.27",
          "pnlUsd": "12.50",
          "txSignature": "<string>",
          "createdAt": "2023-11-07T05:31:56Z"
        }
      ]
    },
    "trade": {
      "id": "<string>",
      "tradingProposalId": "<string>",
      "groupId": "<string>",
      "walletAddress": "<string>",
      "tokenAmount": "4.27",
      "tokenDecimals": 123,
      "pricePerTokenUsd": "12.50",
      "totalCostUsd": "12.50",
      "alphaFeeUsd": "12.50",
      "pnlPct": "4.27",
      "pnlUsd": "12.50",
      "txSignature": "<string>",
      "createdAt": "2023-11-07T05:31:56Z"
    }
  }
}