{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678556080",
    "entityType": "User",
    "nonce": "0xf13d8cc4053426ecf5073846181c1e4f4a54a3e62a9a26dfa5aab98e1262049d",
    "signature": "0x72e92d130f976b095dcf0ffd35ebf730cc5d981aea6ec05d4d26b498a9cbe4d41016fde65aef4598eb3e4d6314d9be5bc29502527967014a7a4cc04e72435b2e1b",
    "signer": "0x04C504928B4945dAF4D6c8D84353Dc1ab5000C1F",
    "userId": "422886157"
  }
}