{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9a75ddf81a7a62cb8d59c9f58bf82efbbfb55e75efad96f9d8c9b1e67dd0fe4d",
    "signature": "0xb74360a8bcda20feb568a29f38eb5cd67baf0e2a7832671977086bee31ce44092641e4137cefdd002e78ceef870ee4b3e506d101dc567216ec5822e3b502b70f1b",
    "signer": "0xd4172DACb313eb72C6Ee29bc685450908f4A1926",
    "userId": "407046354"
  }
}