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"first_capture": "2026-01-20T10:10:00Z", "internal_id": "perpetual-ACU-USDT:USDT", "symbol": "ACU", "denominator": "USDT", "margin": "USDT" }, { "id": "ADA_USD", "type": "perpetual", "base_coin": "ADA", "quote_coin": "USD", "margin_asset": "ADA", "contract_size": 10.0, "quantity_unit": "quote", "underlying": "crypto", "first_capture": "2024-12-13T06:33:00Z", "internal_id": "perpetual-ADA-USD:ADA", "symbol": "ADA", "denominator": "USD", "margin": "ADA" }, { "id": "ADA_USDC", "type": "perpetual", "base_coin": "ADA", "quote_coin": "USDC", "margin_asset": "USDC", "contract_size": 1.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2025-03-28T05:51:00Z", "internal_id": "perpetual-ADA-USDC:USDC", "symbol": "ADA", "denominator": "USDC", "margin": "USDC" }, { "id": "ADA_USDT", "type": "perpetual", "base_coin": "ADA", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 1.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2020-07-08T13:03:00Z", "internal_id": "perpetual-ADA-USDT:USDT", "symbol": "ADA", "denominator": "USDT", "margin": "USDT" }, { "id": "ADBESTOCK_USDT", "type": "perpetual", "base_coin": "ADBESTOCK", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 0.01, "quantity_unit": "base", "underlying": "equity", "first_capture": "2025-09-17T13:50:00Z", "internal_id": "perpetual-ADBESTOCK-USDT:USDT", "symbol": "ADBESTOCK", "denominator": "USDT", "margin": "USDT" }, { "id": "ADISTOCK_USDT", "type": "perpetual", "base_coin": "ADISTOCK", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 0.001, "quantity_unit": "base", "underlying": "equity", "first_capture": "2026-09-14T14:28:00Z", "internal_id": "perpetual-ADISTOCK-USDT:USDT", "symbol": "ADISTOCK", "denominator": "USDT", "margin": "USDT" }, { "id": "ADMSTOCK_USDT", "type": "perpetual", "base_coin": "ADMSTOCK", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 0.01, "quantity_unit": "base", "underlying": "equity", "first_capture": 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"margin_asset": "USDT", "contract_size": 10.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2024-07-15T10:43:17Z", "internal_id": "perpetual-AERO-USDT:USDT", "symbol": "AERO", "denominator": "USDT", "margin": "USDT" }, { "id": "AEVO_USDT", "type": "perpetual", "base_coin": "AEVO", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 1.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2024-03-13T10:58:25Z", "internal_id": "perpetual-AEVO-USDT:USDT", "symbol": "AEVO", "denominator": "USDT", "margin": "USDT" }, { "id": "AGENCY_USDT", "type": "perpetual", "base_coin": "AGENCY", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 10.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2026-10-04T07:25:00Z", "internal_id": "perpetual-AGENCY-USDT:USDT", "symbol": "AGENCY", "denominator": "USDT", "margin": "USDT", "end_date": "2026-11-04T08:31:23.066Z" }, { "id": "AGI_USDT", "type": "perpetual", "base_coin": "AGI", 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10.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2025-04-23T13:15:00Z", "internal_id": "perpetual-ZORA-USDT:USDT", "symbol": "ZORA", "denominator": "USDT", "margin": "USDT" }, { "id": "ZRO_USDT", "type": "perpetual", "base_coin": "ZRO", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 1.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2024-06-20T14:10:56Z", "internal_id": "perpetual-ZRO-USDT:USDT", "symbol": "ZRO", "denominator": "USDT", "margin": "USDT" }, { "id": "ZRX_USDT", "type": "perpetual", "base_coin": "ZRX", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 1.0, "quantity_unit": "base", "underlying": "crypto", "first_capture": "2020-09-12T09:09:26Z", "internal_id": "perpetual-ZRX-USDT:USDT", "symbol": "ZRX", "denominator": "USDT", "margin": "USDT" }, { "id": "ZSSTOCK_USDT", "type": "perpetual", "base_coin": "ZSSTOCK", "quote_coin": "USDT", "margin_asset": "USDT", "contract_size": 0.001, "quantity_unit": 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