{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbb38f6ca2cfeb631bf36505caee7ab9fff6eefbd4cf491777ff1331416700b64",
    "signature": "0x9be390534612cd8e83afed8fc632f6b1ec2a5bc5ddb802ac14b29cf31e9969d31ee9a50e2d47d41a0c72b793ad2e84e9e8526376fe6dd2dde7c043e1840040bc1c",
    "signer": "0xA40BB7f136d32cD2fED178eD2b8ac519dA86B8Da",
    "userId": "500561533"
  }
}