{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xc9baa5505e6c6c9a6fc9ac9a9a81a08e834fec51a73d59e395f21dd73537f0a6",
    "signature": "0xcc126a30426d6b60cb479d08078dc1766e9b703fcc8b5f7c5a58d45dbca4dce95cf8c860dac9d4888404316a63853a12065a2066b78d775a1a1e2ac19c7746f81c",
    "signer": "0x3Ec98fFA47eF7773803b73964753B99Ae2D50f41",
    "userId": "545926315"
  }
}