{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x15909dcdda958120f4c767f700e677be28c5a2bb66b3a9c1cda47f79531df182",
    "signature": "0xb833002592e52a47766385f4465fe146ff23554f608aef9ef999c7e9222f63f83d11555da40e3f8e4086c069198e7c47c5c7f776b86bf50254063aaf5ea2a2fc1b",
    "signer": "0x80BaBdd7604de656E45b52EFA056548D7C078B36",
    "userId": "790313179"
  }
}