{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4440cbfbdbd409d1f06ea985c7f61042eb3b4f2470bf3f3608587665d688ed63",
    "signature": "0x29e25e2d9c04b7592c744302c3f9f44e05d1bee2c8215fb5c3321d32686efe5e1bd1a2620188a3327518997e6fe8c811904a43d6f6120e02c6dc2f8659de2e401b",
    "signer": "0x99DD0e571D7F23eDA3c63f7047e58d83FB91EC91",
    "userId": "211865319"
  }
}