{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x16af22acfa9964819291e4c3c24fd611641284b8281d74611647fa2df238ce1a",
    "signature": "0x85f454776cfa2b3c512c4dcfb232ba2a67a305b78fabb1038d9700579f270bea6cb0c4ab487048c400b0eda9ff8c138184fe77606efb347f069d97422dc33a9e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}