diff --git a/kleros-sdk/src/dataMappings/actions/jsonAction.ts b/kleros-sdk/src/dataMappings/actions/jsonAction.ts
index 3857b4006..87e787131 100644
--- a/kleros-sdk/src/dataMappings/actions/jsonAction.ts
+++ b/kleros-sdk/src/dataMappings/actions/jsonAction.ts
@@ -2,6 +2,10 @@ import { JsonMapping } from "../utils/actionTypes";
 import { createResultObject } from "src/dataMappings/utils/createResultObject";
 
 export const jsonAction = (mapping: JsonMapping) => {
-  const { value: source, seek, populate } = mapping;
-  return createResultObject(source, seek, populate);
+  const { value, seek, populate } = mapping;
+
+  // Parse the source if it's a JSON string
+  const parsedValue = typeof value === "string" ? JSON.parse(value) : value;
+
+  return createResultObject(parsedValue, seek, populate);
 };
diff --git a/kleros-sdk/src/dataMappings/executeActions.ts b/kleros-sdk/src/dataMappings/executeActions.ts
index 049c31a87..2ea43cacd 100644
--- a/kleros-sdk/src/dataMappings/executeActions.ts
+++ b/kleros-sdk/src/dataMappings/executeActions.ts
@@ -42,6 +42,7 @@ export const executeActions = async (mappings, initialContext = {}) => {
 
   for (const mapping of mappings) {
     const actionResult = await executeAction(mapping, context);
+
     if (actionResult) {
       Object.keys(actionResult).forEach((key) => {
         context[key] = actionResult[key];
diff --git a/kleros-sdk/src/dataMappings/utils/createResultObject.ts b/kleros-sdk/src/dataMappings/utils/createResultObject.ts
index 184965e4f..4c4ed2155 100644
--- a/kleros-sdk/src/dataMappings/utils/createResultObject.ts
+++ b/kleros-sdk/src/dataMappings/utils/createResultObject.ts
@@ -1,34 +1,22 @@
-// Can this be replaced by Mustache ?
-export const createResultObject = (sourceData, seek, populate) => {
+export const createResultObject = (sourceData, seek: string[], populate: string[]) => {
   const result = {};
 
-  seek.forEach((key, idx) => {
-    let foundValue = sourceData;
-
-    if (key.includes(".")) {
-      const keyParts = key.split(".");
-      for (const part of keyParts) {
-        if (foundValue[part] !== undefined) {
-          foundValue = foundValue[part];
-        } else {
-          foundValue = undefined;
-          break;
-        }
-      }
-    } else {
-      if (typeof sourceData !== "object" || key === "0") {
-        foundValue = sourceData;
-      } else {
-        foundValue = sourceData[key];
+  const getNestedValue = (obj: any, path: string) => {
+    return path.split(".").reduce((acc, part) => {
+      if (acc && part.includes("[")) {
+        const [key, index] = part.replace(/\]/g, "").split("[");
+        return acc[key]?.[index];
       }
-    }
+      return acc ? acc[part] : undefined;
+    }, obj);
+  };
 
-    console.log(`Seek key: ${key}, Found value:`, foundValue);
+  seek.forEach((key, idx) => {
+    const foundValue = getNestedValue(sourceData, key);
     if (foundValue !== undefined) {
       result[populate[idx]] = foundValue;
-      console.log(`Populate key: ${populate[idx]}, Value to add:`, foundValue);
     }
   });
-  console.log("Result object:", result);
+
   return result;
 };
diff --git a/kleros-sdk/src/dataMappings/utils/replacePlaceholdersWithValues.ts b/kleros-sdk/src/dataMappings/utils/replacePlaceholdersWithValues.ts
index 1d8e16439..a6d25add5 100644
--- a/kleros-sdk/src/dataMappings/utils/replacePlaceholdersWithValues.ts
+++ b/kleros-sdk/src/dataMappings/utils/replacePlaceholdersWithValues.ts
@@ -1,13 +1,17 @@
-export const replacePlaceholdersWithValues = (mapping: any, context: any) => {
-  let mappingAsString = JSON.stringify(mapping);
+import mustache from "mustache";
 
-  const replacedMapping = mappingAsString.replace(/\{\{(\w+)\}\}/g, (_, variableName) => {
-    if (context.hasOwnProperty(variableName)) {
-      return context[variableName];
+export const replacePlaceholdersWithValues = (mapping: any, context: any) => {
+  const replace = (obj) => {
+    if (typeof obj === "string") {
+      return mustache.render(obj, context);
+    } else if (Array.isArray(obj)) {
+      return obj.map(replace);
+    } else if (typeof obj === "object" && obj !== null) {
+      return Object.fromEntries(Object.entries(obj).map(([key, value]) => [key, replace(value)]));
     } else {
-      throw new Error(`Variable '${variableName}' not found in context.`);
+      return obj;
     }
-  });
+  };
 
-  return JSON.parse(replacedMapping);
+  return replace(mapping);
 };