diff --git a/src/wasm/entity.rs b/src/wasm/entity.rs
index 112e0e45..78f82272 100644
--- a/src/wasm/entity.rs
+++ b/src/wasm/entity.rs
@@ -2,17 +2,26 @@ use serde::Deserialize;
 use serde::Serialize;
 
 use super::ast_node::WasmAstNode;
+use super::headline::Noop;
 use super::macros::to_wasm;
 use super::to_wasm::ToWasm;
-use super::AdditionalProperties;
 use crate::compare::ElispFact;
 use crate::types::Entity;
 use crate::wasm::to_wasm::ToWasmStandardProperties;
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct WasmEntity {
-    #[serde(flatten)]
-    pub(crate) additional_properties: AdditionalProperties,
+    pub(crate) name: String,
+    pub(crate) latex: String,
+    #[serde(rename = "latex-math-p")]
+    pub(crate) latex_math_mode: bool,
+    pub(crate) html: String,
+    pub(crate) ascii: String,
+    pub(crate) latin1: Noop,
+    #[serde(rename = "utf-8")]
+    pub(crate) utf8: String,
+    #[serde(rename = "use-brackets-p")]
+    pub(crate) use_brackets: bool,
 }
 
 to_wasm!(
@@ -21,12 +30,19 @@ to_wasm!(
     original,
     wasm_context,
     { WasmAstNode::Entity(original) },
-    { "TODO".into() },
+    { "entity".into() },
     {
         Ok((
             Vec::new(),
             WasmEntity {
-                additional_properties: AdditionalProperties::default(),
+                name: original.name.to_owned(),
+                latex: original.latex.to_owned(),
+                latex_math_mode: original.latex_math_mode,
+                html: original.html.to_owned(),
+                ascii: original.ascii.to_owned(),
+                latin1: Noop {},
+                utf8: original.utf8.to_owned(),
+                use_brackets: original.use_brackets,
             },
         ))
     }