NegRisk-only collapse of a NO-basket back to collateral. Routes through NegRiskAdapter on-chain rather than the vault CTF path.
The body is of type object.
Server-side convert correlation id (UUID).
uint256 EIP-712 salt (decimal string).
uint256 EIP-712 deadline (Unix seconds).
0x-hex backend EIP-712 signature.
Per-user vault address (EIP-712 verifyingContract).
bytes32 NegRisk marketId, 0x-prefixed.
uint256 indexSet bitmap (decimal string).
USDC wei (6-decimal) — exact value bound into the EIP-712 digest.