curl --request GET \
  --url https://api-testnet.context.markets/v2/portfolio/{address}/claimable \
  --header 'Authorization: Bearer <token>'

{
  "positions": [
    {
      "tokenAddress": "<string>",
      "balance": "<string>",
      "settlementBalance": "<string>",
      "walletBalance": "<string>",
      "outcomeIndex": 123,
      "outcomeName": "<string>",
      "marketId": "<string>",
      "netInvestment": "<string>",
      "claimableAmount": "<string>"
    }
  ],
  "markets": [
    {
      "id": "<string>",
      "outcomeTokens": [
        "<string>"
      ],
      "outcomeNames": [
        "<string>"
      ],
      "payoutPcts": [
        "<string>"
      ]
    }
  ],
  "totalClaimable": "<string>"
}