{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1645942",
    "entityType": "User",
    "nonce": "0x03359a1970c0232bde2172e492237f29b17308fe5af710b37903b9ec94ae85f7",
    "signature": "0xf4714dd0b89559f1e695a55422382d9e4e5ce4bceaf70c5f8cd7d016857e1e6c75a40fdc439a403e27c0991f4b353418917f6cb4e6b8bf714e0f468313c356d41c",
    "signer": "0xE534A1ad2e8E1f616866185D1efDf463B0eD38b4",
    "userId": "353625"
  }
}