{
  "manageEntity": {
    "action": "Save",
    "entityId": "562044",
    "entityType": "Track",
    "nonce": "0x0b13684379330b765fac2b7f93e743599f10e2a05b6650eb7eb201391c60e0cd",
    "signature": "0x637be765f44c882b17167dd58d5406b9ad386149fac8db2781445278c967806928d2f31d90e5c5f3100f64706dedd19b07e3b29868f3296c4ac25290702268ff1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}