{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339931",
    "entityType": "User",
    "nonce": "0x0c2f1ea6be3f47774c09b3cc708f4da12d58841bc793a037c5e89bcd6e6e61db",
    "signature": "0x76b6bd91f2a922ecf0465f9989b30bd82f1189be5feb1486720b8a39fb14cd3c671fedbcd9bffeb5df45d41c605d8d2efa51463a2d0da148dce83ec4b93d82df1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}