diff --git a/package.json b/package.json
index 2ee41b2..7a73e26 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@keyko-io/filecoin-verifier-tools",
-  "version": "2.2.2",
+  "version": "2.2.3",
   "description": "Javascript implementation of a HAMT using ipld",
   "main": "lib/index.js",
   "repository": {
diff --git a/src/api/api.ts b/src/api/api.ts
index e7dabc6..c188504 100644
--- a/src/api/api.ts
+++ b/src/api/api.ts
@@ -8,6 +8,7 @@ import { decode } from 'cbor'
 
 const cacheAddress = {}
 const cacheKey = {}
+const SignatureDomainSeparation_RemoveDataCap = "fil_removedatacap:"
 
 export class VerifyAPI {
   constructor(lotusClient, walletContext, testnet = true) {
@@ -67,17 +68,28 @@ export class VerifyAPI {
     return res['/']
   }
 
-  encodeRemoveDataCapParameters(message: [address: string, datacap: string, id: number[]]) {
-    return this.methods.encode(this.methods.RemoveDataCapProposal,message)
+  // encodeRemoveDataCapParameters_old(message: [address: string, datacap: string, id: number[]]) {
+  //   return this.methods.encode(
+  //     this.methods.RemoveDataCapProposal, message
+  //   )
+  // }
+
+  encodeRemoveDataCapParameters(message: {verifiedClient: string, dataCapAmount: string, removalProposalID: number[]}) {
+    const orderedProposalParams = [SignatureDomainSeparation_RemoveDataCap, message.verifiedClient, message.dataCapAmount, message.removalProposalID]
+    return this.methods.encode(this.methods.RemoveDataCapProposal, orderedProposalParams)
   }
 
-  async proposeRemoveDataCap(clientToRemoveDcFrom, datacap, verifier1, signature1, verifier2, signature2, indexAccount, wallet, { gas } = { gas: 0 }) {
-    const removeDatacapProposal = this.methods.verifreg.removeVerifiedClientDataCap(
+  async proposeRemoveDataCap(
+    clientToRemoveDcFrom, datacap,
+    verifier1, signature1, verifier2, signature2,
+    indexAccount, wallet, { gas } = { gas: 0 }) {
+
+    const removeDatacapRequest = this.methods.verifreg.removeVerifiedClientDataCap(
       clientToRemoveDcFrom, datacap,
       { verifier: verifier1, signature: signature1 },
       { verifier: verifier2, signature: signature2 },
     )
-    const tx = this.methods.rootkey.propose(removeDatacapProposal)
+    const tx = this.methods.rootkey.propose(removeDatacapRequest)
     const res = await this.methods.sendTx(this.client, indexAccount, this.checkWallet(wallet), { ...tx, gas })
     return res['/']
   }
diff --git a/src/filecoin/methods.ts b/src/filecoin/methods.ts
index 8e234d6..69c885b 100644
--- a/src/filecoin/methods.ts
+++ b/src/filecoin/methods.ts
@@ -4,9 +4,7 @@ import cbor from "cbor";
 import * as hamt from "../hamt/hamt-2";
 import blake from "blakejs";
 import * as address from "@glif/filecoin-address";
-// const { CID } = require("multiformats/cid");
 import { CID } from "multiformats/cid";
-import multihashes from "multihashes";
 import { identity } from "multiformats/hashes/identity";
 import * as rawFormat from "multiformats/codecs/raw";
 
@@ -731,11 +729,18 @@ function make(testnet) {
 
     const REMOVE_DATACAP_PROPOSAL = [
         "cbor",
-        {
-            verifiedClient: 'address',
-            datacapAmount: 'bigint',
-            removalProposalID: ["list", "int"]
-        },
+        [
+            'string', // sigDomainSeparationString
+            'address', // verifiedClient
+            'bigint', // dataCapAmount
+            ["list", "int"] // removalProposalID
+        ]
+        // {
+        //     sigDomainSeparationString: 'string',
+        //     verifiedClient: 'address',
+        //     dataCapAmount: 'bigint',
+        //     removalProposalID: ["list", "int"]
+        // }
     ];
 
     const reg = {
diff --git a/src/samples/api/encodeRemoveParams.js b/src/samples/api/encodeRemoveParams.js
index 8efed9a..0a62f14 100644
--- a/src/samples/api/encodeRemoveParams.js
+++ b/src/samples/api/encodeRemoveParams.js
@@ -17,15 +17,13 @@ const api = new VerifyAPI.VerifyAPI(VerifyAPI.VerifyAPI.standAloneProvider(endpo
 
 async function removeDatacap() {
   try {
-  
-    const encoded =  api.encodeRemoveDataCapParameters(["t01004",158856254,[1256]])
+    const encoded = api.encodeRemoveDataCapParameters(['t01004', 158856254, [1256]])
     console.log(encoded)
     console.log(encoded.toString('hex'))
     // console.log('encoded:', encoded[0].toString('hex'), encoded[1].toString('hex'), encoded[2].toString('hex'))
-    //datacap 000977f43e  ok!!!
-    //address 00ec07
-    //id 0004e8
-
+    // datacap 000977f43e  ok!!!
+    // address 00ec07
+    // id 0004e8
 
     console.log('834300ec0745000977f43e811904e8')
     console.log(encoded.toString('hex') === '834300ec0745000977f43e811904e8')