{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15644",
    "entityType": "User",
    "nonce": "0x3489fcd2c27fba2fa759368ce5e2492c0f1893bbf42c1e8e8f7c30ab40b83643",
    "signature": "0xfb6781c044e0f3c1585aa2fb2636a943264d4b0a02d6f60db046a12d8cf4f4b86caf3c0fd13087e2dd7d2b05e7452336b5c16c1682111060ade818f680b0221b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}