{
  "manageEntity": {
    "action": "Save",
    "entityId": "185484596",
    "entityType": "Track",
    "nonce": "0x7fd0e7cf6adc4c06f1792dedd34726b1e44254ca2fca96908edd5c370693fd31",
    "signature": "0x20275228d71e726e96e9b8e44147baef965a8adef6d1f55aa838f5a29b1e731f434d0994984d68aad1f6fa45ec575da5ed09f6eae28e0a6cbd3439402c2a51e41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}