{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54545",
    "entityType": "User",
    "nonce": "0x8163236f11288ea0c2660f3e30e53050bcbd13e926ebbf021e819710e30bf584",
    "signature": "0x7d774f64ff3dcaec2f689ed6105d72765204fac801b018913df8de56934322cb22df178f307585aeab93edd81ae8a8a38dc3c6f1175010cfd8dac9a40923fe3d1b",
    "signer": "0x16BE3cc7Ee03C75AD10a94fb7234B045D351825c",
    "userId": "66529124"
  }
}