{
  "manageEntity": {
    "action": "Save",
    "entityId": "431824765",
    "entityType": "Track",
    "nonce": "0x4ff7839021f920ae328b908627db5476603c2aee04b78dc89fc50bc3faa4a510",
    "signature": "0x621e499b8f1d4c40c7f96abc2201ff4760ad1a351ddd3e1466c2a6fe5be8a6b3293514d2554b8db19c8f2a09c7e1b49f8a254177259236d0a28f37e10f158a221c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}