{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0x1a0a845f5d6d1a2aa688e530ac08b024e4bc192fe9e4fe54c9680c1df5586606",
    "signature": "0x76c36b2a57824e9391b203748dab003bb3e3d3cc6c1f23503ae074ea22364690028ae09cdfb30bbb33a9ad28de81b5c6d7b8d93c958b695e2a493da78945dc5c1b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}