{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3916f56d6ca9dc8826036b9a845d71c0939beef89a918e8d4053258643c92bbd",
    "signature": "0x64d740be70e6f3bfb9e5629181bf9c199292ba852cf662c591e44ee92a4d1010461271c9f130593a045c8b15f80a707af1218c75126909b5049cb6bea9b961da1b",
    "signer": "0x939a8009d94fd9Ae9C4129EF1cFaEf3e2EAa8877",
    "userId": "322417563"
  }
}