{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "455521",
    "entityType": "User",
    "nonce": "0xc7ac73995ed53e45efd9c96a4fb15d46b49943fc6f2fb4a0dcd6a0ec216ee463",
    "signature": "0xcf9d98843de267f2ce813577c1ff1338d0a450212053decce2b63511fad0876246a1ed71b915649033e44e0d5fb5e7e3e25a59f2cc0537e159875faee0a7350c1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}