{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xd34bf297a037e146f9ea0c987fdb950d20f7352490907ebdf1d2f6910e5bd7ca",
    "signature": "0xe2e13f7d558a057eb6d4fa24cbec08dfba71c3baf4dec8347c3395e82dde9f0b1650ef913d61d88dcd3beae01d27dc53c3c1b0cafb725546915500b47e5280501c",
    "signer": "0x64b5D065BCE2ae4eB809629c32e7C75ec91cFAD6",
    "userId": "513910447"
  }
}