diff --git a/src/prd.rs b/src/prd.rs
index f4ff01e..f54f7b2 100644
--- a/src/prd.rs
+++ b/src/prd.rs
@@ -1,4 +1,4 @@
-use std::collections::{HashMap, HashSet};
+use std::collections::{BTreeMap, HashSet};
 
 use anyhow::Result;
 use serde::{Deserialize, Serialize};
@@ -62,6 +62,8 @@ pub struct Prd {
     pub keys: Map<String, Value>, // key is a key in pcd, value is the key to decrypt it
     pub pcd_commitments: Value,
     pub validation_tokens: Vec<Proof>,
+    pub roles: BTreeMap<String, RoleDefinition>,
+    pub public_data: BTreeMap<String, String>,
     pub payload: String,      // Additional information depending on the type
     pub proof: Option<Proof>, // This must be None up to the creation of the network message
 }
@@ -82,13 +84,15 @@ impl Prd {
             keys: Map::new(),
             payload: secret_hash.to_string(),
             proof: None,
+            ..Default::default()
         }
     }
 
     pub fn new_update(
         process_id: OutPoint,
         sender: Member,
-        roles: HashMap<String, RoleDefinition>,
+        roles: BTreeMap<String, RoleDefinition>,
+        public_data: BTreeMap<String, String>,
         keys: Map<String, Value>,
         pcd_commitments: Value,
     ) -> Self {
@@ -99,8 +103,10 @@ impl Prd {
             validation_tokens: vec![],
             keys,
             pcd_commitments,
-            payload: serde_json::to_string(&roles).expect("We're confident it's serializable"),
+            payload: String::new(),
             proof: None,
+            roles,
+            public_data,
         }
     }
 
@@ -119,6 +125,7 @@ impl Prd {
             pcd_commitments,
             payload: String::default(),
             proof: None,
+            ..Default::default()
         }
     }
 
@@ -136,6 +143,7 @@ impl Prd {
             keys: Map::new(),
             payload: String::default(),
             proof: None,
+            ..Default::default()
         }
     }