{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421492876",
    "entityType": "User",
    "nonce": "0x83ed2c6f95cfdabd602e5cc848d9eb1c4bd913ffb1e737175846ff214126818d",
    "signature": "0x4ea25c1d2f316e6150e5759256e977d917ab5a23d5f7c4eed85ed296f4750d3b33b2f39289a7049d29fb57f0b7ca9f20fb069d5999f21e1a82efe9adb7bed7941c",
    "signer": "0x591E8b46f0D8b7a1FeD63222b6e5E3EaBe2900F6",
    "userId": "877370116"
  }
}