{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfb56a5fcef0213694749945cc76d05be1997e6283ca1fcd53345c125d7d46d72",
    "signature": "0x65d038b670b518dd53003e430130a6d1343f260de1cf133ab74887413b03034204db2122c920860592faff5b9f81c586f553e6a3ba06111d69a94353f8e76ef71b",
    "signer": "0x687Ca5f210a68254CCF5A7F00296C1842f754841",
    "userId": "973001710"
  }
}