We propose a theoretical framework in which spacetime curvature and localized energy density emerge from modulations of vacuum entanglement structure. Building upon quantum energy teleportation (QET) protocols and the entanglement-geometry correspondence, we introduce an operational mechanism by which local measurements can induce energy redistribution across spacelike-separated regions. This mechanism does not involve classical signal propagation and remains consistent with causality and quantum energy inequalities. We formalize this hypothesis through an effective entanglement stress-energy tensor and derive its implications for geometry, energy flow, and negative energy densities. Experimental signatures include curvature shifts detectable by atom interferometers, clock desynchronization in optical networks, and vacuum pressure changes in Casimir systems. We identify feasible experimental platforms and outline protocols to test this proposal within current or near-future precision measurement technologies.