{
  "manageEntity": {
    "action": "Save",
    "entityId": "42928",
    "entityType": "Track",
    "nonce": "0x987eaea73ff85532849e899b22f2e5b5dcf7f1eab084f07dcf44a66eae8bface",
    "signature": "0xcea8442d0e4a956f92d0b14bec2bd3819ae83094ab5bbbd5efbe2a028086db9955852b6638bbbd1e26b2940768f9dca5d7467cc8975eedc83ffcec6201b20ed31b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}