{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338548",
    "entityType": "User",
    "nonce": "0x1f269a83eedb4ff93d793887994e5f8438a55f4cbc15fda3ab9b2e34d87f1856",
    "signature": "0x142fadad5637986bb995c8ff301f19fafd1d4fed5ee6b7aa4610ff21fdef99c56f86a4fc4fccf6db6a5a45397dae64a1e17eb0dda8d82a0866622f08acadac8c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}