{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0xd43f85f9fc45300efcfbba5f49ff35e7a04e9be0f8c681950024ec068e80c945",
    "signature": "0xef0c7609cc413e9366e5c7b06e50774b50b1fdf026ad7ffc31784ca244d117676ecedac9d55e8a46f63e3af39b888893fd7abf90b783ea085677c94361ea260a1b",
    "signer": "0x75a075dd45bE38AA2c27754D97d5d84dD624FeA5",
    "userId": "451351"
  }
}