{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "64821",
    "entityType": "User",
    "nonce": "0x6cb1b8edd3e2bd235dda2d4b00a7def2f3191c36c79be1146f2f4496137d4142",
    "signature": "0xac4cc31d01224433888b28d0d895a33da9609690783771be85bd23b6a98e64d7384b3952248fcbfd1c4a11e83e86b28ff10629c25780b80294f501209c09cbaf1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}