{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x337a3e67a6c44e4c8cf8fdc73eb02a2f5946dc87aab4662c45d64d6191787dc7",
    "signature": "0xa4e9d694e45ae0f7f7b2f666a1710479e0e1e0a9c85971ed41ab7c5da43905cb75484739a37cff3540ab995810f60875349c3b958d2b29955e0bf5b72d81a8c81c",
    "signer": "0x7fdeEB144300AC6b1Be0E83d8f006b2D3140F73D",
    "userId": "325377357"
  }
}