{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x69744b511acf6b799e59e1f53aa2a3c3efa305fb5785ae2492e7edf3eb9a0537",
    "signature": "0xcf1385014eff46b92b40c85a944b797513f38853589ef08332f48368a6aee5cd7b4d68a6b91f07fe9eb2643ad4b8e3c6ebc3fb7593e39c4c516482726b99faf91b",
    "signer": "0xC596F7BD734C9318e9Da82801dD96A6d16d02eB2",
    "userId": "553720762"
  }
}