{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x03190d550d26edc83b69257e12017e79948c5c3dfc02d17389b19f245090c29a",
    "signature": "0x9cf5f1b8053dc4372feffe161998cbace8a4c9d41ce66c9e501548cfd7f2abb77d0dcfb7fc40ffe4dc5acb7c486cc052d72a6969bea96900ca7a92f404530a8c1b",
    "signer": "0xC3Ac4CBa184F40C88d99Bf359f44FFA17c5624F8",
    "userId": "818848942"
  }
}