{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1450501",
    "entityType": "User",
    "nonce": "0x4bb8dc8bf598ca5bae739675f837ab52683b3d27b0f706383e4d398276897671",
    "signature": "0xc6fe3ae6c199a05afe383a3a9ea51dd86c06f25581f2b17f94cc9d8da0cb34d462abd83cead782228d9bfcb99e8b9a77654762eaa6c39e48bafb03f591aede531b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}