{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728767219",
    "entityType": "User",
    "nonce": "0x223f2aee9e1f9b9527297dd984dd1fa2007ca934e9462e29ea65d35bb78c45a5",
    "signature": "0xc581f75bde87f235e8e38c7a0379711933dc7a58a9632e8c4ad6faea6bb087020da80482815eac733050a65e41eae4d1e19b37a8e04bdaaa0d0423656a026cad1c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}