{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843",
    "entityType": "User",
    "nonce": "0x075a72c2ce00cf537cc4457681b4cc4768e3a3a34af1689bc46dc7825d148920",
    "signature": "0xcbc195b562fc5406bc576e9f09cde7e0349b2156250224e5aa9be3495f2336b52d31ca854585a9728c75bb74634685b2025d193d0f2229f9eb7455e085c508cf1c",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}