diff --git a/Cargo.lock b/Cargo.lock
index 33d4c1e..4bd553f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2926,6 +2926,7 @@ dependencies = [
  "reqwest 0.12.19",
  "secp256k1",
  "serde",
+ "serde_wormhole",
  "sha3",
  "solana-account-decoder",
  "solana-client",
diff --git a/Cargo.toml b/Cargo.toml
index e12efcf..5f824db 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ hex = { version = "0.4.3", features = ["serde"] }
 reqwest = { version = "0.12.19", features = ["json"] }
 secp256k1 = { version = "0.31.0", features = ["recovery"] }
 serde = "1.0.219"
+serde_wormhole = "0.1.0"
 sha3 = "0.10.8"
 solana-account-decoder = "2.2.7"
 solana-client = "2.2.7"
diff --git a/src/api_client.rs b/src/api_client.rs
index e8210cc..8e0e4ec 100644
--- a/src/api_client.rs
+++ b/src/api_client.rs
@@ -23,13 +23,23 @@ pub struct ApiClient {
 const DEFAULT_TIMEOUT: Duration = Duration::from_secs(5);
 
 #[derive(Serialize, Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Observation<P> {
+pub struct Observation<P: Serialize> {
     pub version: u8,
     #[serde(with = "hex::serde")]
     pub signature: [u8; 65],
+    #[serde(serialize_with = "serialize_body")]
     pub body: Body<P>,
 }
 
+fn serialize_body<S, P>(body: &Body<P>, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+    P: Serialize,
+{
+    let serialized = serde_wormhole::to_vec(body).map_err(serde::ser::Error::custom)?;
+    serializer.serialize_bytes(&serialized)
+}
+
 impl<P: Serialize> Observation<P> {
     pub fn try_new(body: Body<P>, secret_key: SecretKey) -> Result<Self, anyhow::Error> {
         let digest = body.digest()?;
diff --git a/src/main.rs b/src/main.rs
index d47dbb3..c567312 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,6 +4,7 @@ use {
     clap::Parser,
     posted_message::PostedMessageUnreliableData,
     secp256k1::SecretKey,
+    serde_wormhole::RawMessage,
     solana_account_decoder::UiAccountEncoding,
     solana_client::{
         nonblocking::pubsub_client::PubsubClient,
@@ -93,31 +94,30 @@ async fn run_listener(input: RunListenerInput) -> Result<(), PubsubClientError>
             continue;
         }
 
-        let body = Body {
-            timestamp: unreliable_data.submission_time,
-            nonce: unreliable_data.nonce,
-            emitter_chain: unreliable_data.emitter_chain.into(),
-            emitter_address: Address(unreliable_data.emitter_address),
-            sequence: unreliable_data.sequence,
-            consistency_level: unreliable_data.consistency_level,
-            payload: unreliable_data.payload.clone(),
-        };
-
-        match Observation::try_new(body, input.secret_key) {
-            Ok(observation) => {
-                tokio::spawn({
-                    let api_client = input.api_client.clone();
-                    async move {
+        tokio::spawn({
+            let api_client = input.api_client.clone();
+            async move {
+                let body = Body {
+                    timestamp: unreliable_data.submission_time,
+                    nonce: unreliable_data.nonce,
+                    emitter_chain: unreliable_data.emitter_chain.into(),
+                    emitter_address: Address(unreliable_data.emitter_address),
+                    sequence: unreliable_data.sequence,
+                    consistency_level: unreliable_data.consistency_level,
+                    payload: RawMessage::new(unreliable_data.payload.as_slice()),
+                };
+                match Observation::try_new(body.clone(), input.secret_key) {
+                    Ok(observation) => {
                         if let Err(e) = api_client.post_observation(observation).await {
                             tracing::error!(error = ?e, "Failed to post observation");
                         } else {
                             tracing::info!("Observation posted successfully");
-                        }
+                        };
                     }
-                });
+                    Err(e) => tracing::error!(error = ?e, "Failed to create observation"),
+                }
             }
-            Err(e) => tracing::error!(error = ?e, "Failed to create observation"),
-        };
+        });
     }
 
     tokio::spawn(async move { unsubscribe().await });