{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "334321",
    "entityType": "User",
    "nonce": "0x573a06cf6e84625a4e0c029a47d4127162355aaecce74cb08b8fe8e4820ef96d",
    "signature": "0xbf019b3f7995b742abaff38259712bd1a83cfdb4ff70b037a73fa875d4cec2616be3d5ee12337b81bd2a6fe4b5941e116f53633d2fb3ce99410cf8b607b1a5ed1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}