{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "64438",
    "entityType": "User",
    "nonce": "0x5645db4b769b6a50a3a66d9cdd34bacb5425b132c7693424a5a7e4cafcaf7eda",
    "signature": "0x19a94d85b9d04cd7e30e671362a58f609ec1d104e3280809534547a205a6fe8966779e48ec56f2437388d90c9ed78edfc9c31d4200f54194056ba8752a39d6181b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}