{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3e4ccf087ea46bcb1b40470e5f7a2817ed0994005d05a1fd3b70564b51b60662",
    "signature": "0x50f7f95795f62fb4f202841de9870d1c4c96037f13e6f27672331981d13154e01059bc24dcb8948d5c88466a4da917b5c1bd086c5223262afa65123601466fe11b",
    "signer": "0xA9CB0a7922c4590e3cEC7c0224b86A81C4a7c4d3",
    "userId": "501005008"
  }
}