{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0x209f29d6f8c807b4864b0b8aa8875cb0d93b15cbb4b571dc55b3e0d8250f1510",
    "signature": "0x59b479831d180da48f86bfb4eaae57a471d6f3361ba72bc4a966f80daf87d0c504a64a2351df80a2eeb23a11311f54e7b8cabc1879f42fdf6f65cdee12561dc31c",
    "signer": "0x3256829bD2C36780Db69b5c18671A1DA06B8d505",
    "userId": "468369673"
  }
}