{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6478d369a0ca76a4b7393424ffe49b5cf3f3d0cfb42b7907468990d75004c73f",
    "signature": "0xdd7e4b2b8fb4d28c87a1e376d3182aec1abb511e4a47a810f9db3d7ac2d58d8f149c4af968de13999909d6ea65db45993a2d0274167b5caede2d21e677d4c1131c",
    "signer": "0x40f9c8F93a5aDBc620CB9B7707fAbcbA2fDFaBbA",
    "userId": "765901034"
  }
}