{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x891a738c47a2ec0d2a19c5f458a1f07a8b608d4c98ed88a40568453d1343971e",
    "signature": "0x3ff648c9c4e7fafa4178cbcacea0aef1ac433348c1f838516bbfd8a138e2ec5a2702cda877c1bcd3a20fb66cec226c7d6d6212e1f8b7bc5ed249a551bb9246711c",
    "signer": "0xD4331dd613C0E5fa9B91008910A330ef2e333ad4",
    "userId": "450273329"
  }
}