{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423",
    "entityType": "User",
    "nonce": "0x2eb427f3ad8a779e4978d16a046dce4342860fbb5d459fbdf9de03d88886c4ac",
    "signature": "0x5ca5000433fbde87b64709417b041a60b7d24ff4d31220d59a91c4610abdb8342d87306a22a7456432ec0609dba848656464d523c50ce14a79986d3ca70a95cf1c",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}