curl --request POST \
  --url https://api.cdp.coinbase.com/platform/v1/stake/build \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "network_id": "ethereum-mainnet",
  "asset_id": "ETH",
  "address_id": "0xfc807D1bE4997e5C7B33E4d8D57e60c5b0f02B1a",
  "action": "unstake",
  "options": {}
}'

{
  "id": "d91d652b-d020-48d4-bf19-5c5eb5e280c7",
  "wallet_id": "d91d652b-d020-48d4-bf19-5c5eb5e280c7",
  "network_id": "ethereum-hoodi",
  "address_id": "0xfc807D1bE4997e5C7B33E4d8D57e60c5b0f02B1a",
  "status": "initialized",
  "transactions": [
    {
      "network_id": "base-sepolia",
      "from_address_id": "0xfc807D1bE4997e5C7B33E4d8D57e60c5b0f02B1a",
      "unsigned_payload": "<string>",
      "signed_payload": "<string>",
      "transaction_hash": "0x53e11e94ebb2438d6ddcfa07dabc9b551d2f440f8363fea941083bc397a86a42",
      "transaction_link": "https://sepolia.basescan.org/tx/0x53e11e94ebb2438d6ddcfa07dabc9b551d2f440f8363fea941083bc397a86a42",
      "status": "pending",
      "content": {
        "from": "0xfc807D1bE4997e5C7B33E4d8D57e60c5b0f02B1a",
        "gas": 1000,
        "gas_price": 1000,
        "hash": "0x53e11e94ebb2438d6ddcfa07dabc9b551d2f440f8363fea941083bc397a86a42",
        "input": "<string>",
        "nonce": 136,
        "to": "0xfc807D1bE4997e5C7B33E4d8D57e60c5b0f02B1a",
        "index": "0x53e11e94ebb2438d6ddcfa07dabc9b551d2f440f8363fea941083bc397a86a42",
        "value": 100,
        "type": 2,
        "max_fee_per_gas": 190,
        "max_priority_fee_per_gas": 100,
        "priority_fee_per_gas": 1000,
        "transaction_access_list": {
          "access_list": [
            {
              "address": "<string>",
              "storage_keys": [
                "<string>"
              ]
            }
          ]
        },
        "flattened_traces": [
          {
            "error": "<string>",
            "type": "<string>",
            "from": "<string>",
            "to": "<string>",
            "value": "<string>",
            "gas": 123,
            "gas_used": 123,
            "input": "<string>",
            "output": "<string>",
            "sub_traces": 123,
            "trace_address": [
              123
            ],
            "trace_type": "<string>",
            "call_type": "<string>",
            "trace_id": "<string>",
            "status": 123,
            "block_hash": "<string>",
            "block_number": 123,
            "transaction_hash": "<string>",
            "transaction_index": 123
          }
        ],
        "block_timestamp": "2023-04-01T12:00:00Z",
        "mint": "0",
        "rlp_encoded_tx": "0x02f582426882013d8502540be4008502540be41c830493e094a55416de5de61a0ac1aa8970a280e04388b1de4b6f843a4b66f1c0808080"
      }
    }
  ],
  "metadata": "<any>"
}