{
  "manageEntity": {
    "action": "Save",
    "entityId": "1427252341",
    "entityType": "Track",
    "nonce": "0xb60a80c1c0548fe0bad08d12aca38cc7c89dc8386c3efe85002017e004619518",
    "signature": "0x9058212113da5a9fee40fd9cdb3aec8b4698479610627d9f1566232b2f5e180664cdedb43429905440209d91fc35d7d3fa4f3b24bcc72b9c64abef769c2cc3211b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}