{
  "manageEntity": {
    "action": "Save",
    "entityId": "520648967",
    "entityType": "Track",
    "nonce": "0x7b5b768af4557797c4bd484c1de3530a81d2a3a5bbc3788ab1e51c4c6e152a10",
    "signature": "0xc967ca161ad8c8e0378f572c274e813fae061b0bf9ab215d2ad8d0132463344e701bfa2e4275fc1483a7e5e1026ab8eecf18bca2c366e72f877c36d8a39db8371b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}