diff --git a/packages/nextjs/app/admin/page.tsx b/packages/nextjs/app/admin/page.tsx
index c7d1efe..77e86ae 100644
--- a/packages/nextjs/app/admin/page.tsx
+++ b/packages/nextjs/app/admin/page.tsx
@@ -1,12 +1,20 @@
 "use client";
 
 import { useEffect, useState } from "react";
+import { useAccount, useSignTypedData } from "wagmi";
 import { GrantData } from "~~/services/database/schema";
+import { EIP_712_DOMAIN, EIP_712_TYPES__REVIEW_GRANT } from "~~/utils/eip712";
+import { PROPOSAL_STATUS, ProposalStatusType } from "~~/utils/grants";
 import { notification } from "~~/utils/scaffold-eth";
 
 // ToDo. "Protect" with address header or PROTECT with signing the read.
+// ToDo. Submitted grants
+// ToDo. Loading states (initial, actions, etc)
+// ToDo. Refresh list after action
 const AdminPage = () => {
+  const { address } = useAccount();
   const [grants, setGrants] = useState<GrantData[]>([]);
+  const { signTypedDataAsync } = useSignTypedData();
 
   useEffect(() => {
     const getGrants = async () => {
@@ -22,6 +30,38 @@ const AdminPage = () => {
     getGrants();
   }, []);
 
+  const reviewGrant = async (grant: GrantData, action: ProposalStatusType) => {
+    let signature;
+    try {
+      signature = await signTypedDataAsync({
+        domain: EIP_712_DOMAIN,
+        types: EIP_712_TYPES__REVIEW_GRANT,
+        primaryType: "Message",
+        message: {
+          grantId: grant.id,
+          action: action,
+        },
+      });
+    } catch (e) {
+      console.error("Error signing message", e);
+      notification.error("Error signing message");
+      return;
+    }
+
+    try {
+      await fetch(`/api/grants/${grant.id}/review`, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ signature, signer: address, action }),
+      });
+      notification.success(`Grant reviewed: ${action}`);
+    } catch (error) {
+      notification.error("Error reviewing grant");
+    }
+  };
+
   return (
     <div className="container mx-auto max-w-screen-md mt-12">
       <h1 className="text-4xl font-bold">Admin page</h1>
@@ -30,8 +70,27 @@ const AdminPage = () => {
           <h2 className="font-bold mt-8">All grants that need review:</h2>
           {grants.map(grant => (
             <div key={grant.id} className="border p-4 my-4">
-              <h3 className="font-bold">{grant.title}</h3>
+              <h3 className="font-bold">
+                {grant.title}
+                <span className="text-sm text-gray-500 ml-2">({grant.id})</span>
+              </h3>
               <p>{grant.description}</p>
+              {grant.status === PROPOSAL_STATUS.PROPOSED && (
+                <div className="mt-4">
+                  <button
+                    className="bg-green-500 hover:bg-green-700 text-white font-bold py-2 px-4 rounded"
+                    onClick={() => reviewGrant(grant, PROPOSAL_STATUS.APPROVED)}
+                  >
+                    Approve
+                  </button>
+                  <button
+                    className="bg-red-500 hover:bg-red-700 text-white font-bold py-2 px-4 rounded ml-4"
+                    onClick={() => reviewGrant(grant, PROPOSAL_STATUS.REJECTED)}
+                  >
+                    Reject
+                  </button>
+                </div>
+              )}
             </div>
           ))}
         </>
diff --git a/packages/nextjs/app/api/grants/[grantId]/review/route.tsx b/packages/nextjs/app/api/grants/[grantId]/review/route.tsx
new file mode 100644
index 0000000..b285075
--- /dev/null
+++ b/packages/nextjs/app/api/grants/[grantId]/review/route.tsx
@@ -0,0 +1,35 @@
+import { NextRequest, NextResponse } from "next/server";
+import { recoverTypedDataAddress } from "viem";
+import { reviewGrant } from "~~/services/database/grants";
+import { EIP_712_DOMAIN, EIP_712_TYPES__REVIEW_GRANT } from "~~/utils/eip712";
+
+export async function POST(req: NextRequest, { params }: { params: { grantId: string } }) {
+  const { grantId } = params;
+  const { signature, signer, action } = await req.json();
+
+  // Validate Signature
+  const recoveredAddress = await recoverTypedDataAddress({
+    domain: EIP_712_DOMAIN,
+    types: EIP_712_TYPES__REVIEW_GRANT,
+    primaryType: "Message",
+    message: {
+      grantId: grantId,
+      action: action,
+    },
+    signature,
+  });
+
+  if (recoveredAddress !== signer) {
+    console.error("Signature error", recoveredAddress, signer);
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  try {
+    await reviewGrant(grantId, action);
+  } catch (error) {
+    console.error("Error approving grant", error);
+    return NextResponse.json({ error: "Error approving grant" }, { status: 500 });
+  }
+
+  return NextResponse.json({ success: true });
+}
diff --git a/packages/nextjs/scaffold.config.ts b/packages/nextjs/scaffold.config.ts
index bee782e..ca452a5 100644
--- a/packages/nextjs/scaffold.config.ts
+++ b/packages/nextjs/scaffold.config.ts
@@ -11,7 +11,7 @@ export type ScaffoldConfig = {
 
 const scaffoldConfig = {
   // The networks on which your DApp is live
-  targetNetworks: [chains.optimism],
+  targetNetworks: [chains.mainnet],
 
   // The interval at which your front-end polls the RPC servers for new data
   // it has no effect if you only target the local network (default is 4000)
diff --git a/packages/nextjs/services/database/grants.ts b/packages/nextjs/services/database/grants.ts
index cf24ab2..5c42539 100644
--- a/packages/nextjs/services/database/grants.ts
+++ b/packages/nextjs/services/database/grants.ts
@@ -1,13 +1,6 @@
 import { getFirestoreConnector } from "./firestoreDB";
 import { GrantData } from "./schema";
-
-export const PROPOSAL_STATUS = {
-  PROPOSED: "proposed",
-  APPROVED: "approved",
-  SUBMITTED: "submitted",
-  COMPLETED: "completed",
-  REJECTED: "rejected",
-} as const;
+import { PROPOSAL_STATUS, ProposalStatusType } from "~~/utils/grants";
 
 const firestoreDB = getFirestoreConnector();
 const grantsCollection = firestoreDB.collection("grants");
@@ -73,6 +66,15 @@ export const getAllCompletedGrants = async () => {
   }
 };
 
+export const reviewGrant = async (grantId: string, action: ProposalStatusType) => {
+  try {
+    await grantsCollection.doc(grantId).update({ status: action });
+  } catch (error) {
+    console.error("Error approving the grant:", error);
+    throw error;
+  }
+};
+
 export const getGrantsStats = async () => {
   // Summation of askAmount for completed grants: total_eth_granted
   // Total number of completed grants : total_completed_grants
diff --git a/packages/nextjs/utils/eip712.ts b/packages/nextjs/utils/eip712.ts
new file mode 100644
index 0000000..d4316d6
--- /dev/null
+++ b/packages/nextjs/utils/eip712.ts
@@ -0,0 +1,13 @@
+export const EIP_712_DOMAIN = {
+  name: "BuidlGuidl Grants",
+  version: "1",
+  chainId: 1,
+} as const;
+
+// ToDo. We could add more fields (grant title, builder, etc)
+export const EIP_712_TYPES__REVIEW_GRANT = {
+  Message: [
+    { name: "grantId", type: "string" },
+    { name: "action", type: "string" },
+  ],
+} as const;
diff --git a/packages/nextjs/utils/grants.ts b/packages/nextjs/utils/grants.ts
new file mode 100644
index 0000000..758dbda
--- /dev/null
+++ b/packages/nextjs/utils/grants.ts
@@ -0,0 +1,9 @@
+export const PROPOSAL_STATUS = {
+  PROPOSED: "proposed",
+  APPROVED: "approved",
+  SUBMITTED: "submitted",
+  COMPLETED: "completed",
+  REJECTED: "rejected",
+} as const;
+
+export type ProposalStatusType = (typeof PROPOSAL_STATUS)[keyof typeof PROPOSAL_STATUS];