{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x757e4f63d8bfc7d2d5dbc4ec4ca3022bbf3ee2f258d730f7aa6b201ed5035eca",
    "signature": "0x587a67d0053cde64368311f93b81fe07c39ed21263e4ae24b0489aa84a9685c30b5ba090d91d272e07ecd87b6883b41ffee867e1b2356e2b3da97572ec5e9e671b",
    "signer": "0x7B499405130cFEFBBaec9980A9E37BBE42E8589D",
    "userId": "633494619"
  }
}