{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0x8e7941ee38157080d646fb96d6dd04609313796d04f5cf3fd092a3f630b74e72",
    "signature": "0x78480af53b09999a96c5f7c9b4c0abd9ea7c36c270e115a5cd0dbfa8094f20b8525f4d79424740af9de381eafd9facbf1b9d73fb5366a5d514d18bdfd35ed3a81b",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}