{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "211416595",
    "entityType": "User",
    "nonce": "0x836b9ad959f2b22ad84ff97d6b744f4d7dd502ccc7aa96c6985ce49a12d336f5",
    "signature": "0x521b73dbce73a26869ef7377c7f35b04f8105f43a98bd512d2514828c95f938a4dbaf07aa34f986afd81570a603ae751ec93b6185b6f28370bc663fec5cdbb6e1b",
    "signer": "0xb660Bcfa572F73511A1F2a01D0E5de2FE7fDd1cA",
    "userId": "123273"
  }
}