{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "122421",
    "entityType": "User",
    "nonce": "0xadd7f4b2478ed14d0e7cd7057461bb3c0e4fc9495fb17a905b7a9557bafd1866",
    "signature": "0xe96a955c1530764699bdfd15ce6a9e4be7c5d14ac4825c6952e95e2fe0591c5115dddae280cbe772b5e49510a6d89f926ef568443d4aa4f92a6c1581f59243781b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}