{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18278",
    "entityType": "User",
    "nonce": "0x12cc09698e900518748b2fd189e27bb2d32cfaa0bfe565b93dc902e792515ba1",
    "signature": "0x6a6014a5fb4f35faf1cce6ec892f9c6572a6aac65ffd2dac76fc506b7ba703a82bd93a38edc7e9aa8d6a49817f3353bd820bfd4e903f0d0e90c33414128a17b41b",
    "signer": "0x16e1A840950aa44eF9AB748462Aa51EA80bb91AF",
    "userId": "375137667"
  }
}