diff --git a/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.spec.ts b/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.spec.ts
new file mode 100644
index 000000000..c5a729f52
--- /dev/null
+++ b/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.spec.ts
@@ -0,0 +1,69 @@
+import { MerkleTreeService } from './merkleTree.service';
+import MerkleTree from 'merkletreejs';
+
+let merkleTreeService: MerkleTreeService;
+let payload: any;
+beforeAll(async () => {
+  payload = {
+    SupplierInvoiceID: 'INV123',
+    Amount: 300,
+    IssueDate: '2023-06-15',
+    DueDate: '2023-07-15',
+    Status: 'NEW',
+    Items: [
+      { id: 1, productId: 'product1', price: 100, amount: 1 },
+      { id: 2, productId: 'product2', price: 200, amount: 1 },
+    ],
+  };
+  merkleTreeService = new MerkleTreeService();
+});
+
+describe('MerkleTree Service', () => {
+  it('Should merkelize raw json with arrays properly', async () => {
+    // Arrange
+    const expectedLeaves = [
+      'SupplierInvoiceID',
+      'INV123',
+      'Amount',
+      '300',
+      'IssueDate',
+      '2023-06-15',
+      'DueDate',
+      '2023-07-15',
+      'Status',
+      'NEW',
+      'id',
+      '1',
+      'productId',
+      'product1',
+      'price',
+      '100',
+      'amount',
+      '1',
+      'id',
+      '2',
+      'productId',
+      'product2',
+      'price',
+      '200',
+      'amount',
+      '1',
+    ];
+
+    // Act
+    const merkelizedPayload = merkleTreeService.merkelizePayload(
+      payload,
+      'sha256',
+    );
+
+    const expectedPayload = merkleTreeService.formMerkleTree(
+      expectedLeaves,
+      'sha256',
+    );
+
+    // Assert
+    expect(MerkleTree.marshalTree(expectedPayload)).toBe(
+      MerkleTree.marshalTree(merkelizedPayload),
+    );
+  });
+});
diff --git a/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.ts b/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.ts
index a0cf6f883..288722c3a 100644
--- a/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.ts
+++ b/examples/bri-3/src/bri/merkleTree/services/merkleTree.service.ts
@@ -19,4 +19,24 @@ export class MerkleTreeService {
       return crypto.createHash(hashAlgName).update(data).digest();
     };
   }
+
+  public merkelizePayload(payload: JSON, hashAlgName: string): MerkleTree {
+    const leaves: string[] = [];
+    const recurse = (payload: JSON, _currentKey: string) => {
+      for (const key in payload) {
+        const value = payload[key];
+        if (value != undefined) {
+          if (value && typeof value === 'object') {
+            recurse(value, key);
+          } else {
+            leaves.push(key);
+            leaves.push(value.toString());
+          }
+        }
+      }
+    };
+
+    recurse(payload, null);
+    return this.formMerkleTree(leaves, hashAlgName);
+  }
 }