{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9e0eb4a3a451eb8f86f1f7fa457ad58fd9ffb8fd4f34f4755e2adaee54dfffb0",
    "signature": "0x419932d0d8a3e8f69f8ac642c3cd118bcbd45f6df23353f1646d9535b9d9be071c1f1cbf39354a619120a2ca38953e12fbd3689734b6593b6cfbc961cfa6e2aa1b",
    "signer": "0x128a21125C52D203631b9833393f59AA73c35b9b",
    "userId": "553042995"
  }
}