{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18192",
    "entityType": "User",
    "nonce": "0xb99fefb01d65afc30404f212028d7a3282862714123698e7cdc67fa57bee900a",
    "signature": "0xc9ab9432cf9cc06ead52affcb10cb2491fdf9e06b11c1c1cc21de3bd6d04160d0b5a387ee52cb2e943d5dc9361fd449b6b232b052c17e0896a8cb2e245e4c0871c",
    "signer": "0xfe0812559692b402114f2E22b5680970591c3e39",
    "userId": "900235710"
  }
}