{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "419734",
    "entityType": "User",
    "nonce": "0x522176ee185fff98d2689565e57bd981ced48be75ebaab6dacaab87f4f9f7e82",
    "signature": "0x05402bfbf5c5afb97accdf64fb15ea17722393bd9f99142abcbcec03103fc2da53bc82cc8570bcef5a393ff29c7f5342627d382364926f64f02108c0f94dfda01b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}