{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "159450",
    "entityType": "User",
    "nonce": "0x4878e17e13ed0008a980d06e922b054977a0d1e98a1676d061e0836ccdc26713",
    "signature": "0x3e72aeba6c8034b761dcabe51e9ae241916df3f84d15395437ce45e06025c9b25a5646e4ae55743b9f2e03c0669eaad5a6cf00a22924276600e06f430bcafe691c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}