{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1584941",
    "entityType": "User",
    "nonce": "0x16a92551d69703f975af8c6f062e4050c0623ecd79ddfe818e3a4123c00c1c52",
    "signature": "0x3d6870cade60d8f1493bacf9d195040875aaf6ae7ee6a55a8e3bbadacd8d71552ebabf27ed25b54269ea716bb4040e84dba984f2cbd1e026b887b795ae2b6bdd1b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}