{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "143240",
    "entityType": "User",
    "nonce": "0x91ca94ef0c2840bcaa2406250af715568c8fd34b3010966765172a5f8d5f7b5a",
    "signature": "0x7fb691f766ac2599bed1b6df0a2948879b2ee05b03e2ad9d32b8048e85c874af4a0b41868511910ce68f23e70a7362c0fd743cc48242a49e6532f432335d83dd1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}