{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708291620",
    "entityType": "User",
    "nonce": "0xfe874c41b2796676df1295d17d0231cc0fa33400d8cb9b5b3f29437be52bc225",
    "signature": "0x99deefb0c0e8065b1fb1e18beda90d779589ae953f31d7f2d033a5b1ded39a79146aabbff148b920d755194e0d6595acf85fa702bbe33f88b6baaffeaa8309971c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}