  We prove that a maximally modulated singular oscillatory integral operator
along a hypersurface defined by $(y,Q(y))\subseteq \mathbb{R}^{n+1}$, for an
arbitrary non-degenerate quadratic form $Q$, admits an a priori bound on $L^p$
for all $1<p<\infty$, for each $n \geq 2$. This operator takes the form of a
polynomial Carleson operator of Radon-type, in which the maximally modulated
phases lie in the real span of $\{p_2,\ldots,p_d\}$ for any set of fixed
real-valued polynomials $p_j$ such that $p_j$ is homogeneous of degree $j$, and
$p_2$ is not a multiple of $Q(y)$. The general method developed in this work
applies to quadratic forms of arbitrary signature, while previous work
considered only the special positive definite case $Q(y)=|y|^2$.
