{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x215ebce847d423f8abefa5fd2a2ba31e76044ef71be521a8c0e84fe6423714bb",
    "signature": "0x3c866152961bafcdd87e9df2f891357b021904e5e4c9b6f14b7277f18c9f8bbc27bb2e2a54418d69bf9be095f2fb7de7cf927896f88f14af3ab9261658d3bcb81c",
    "signer": "0x4d4139541BC11156cD0290eaabf053F3D00b4704",
    "userId": "433912365"
  }
}