{
  "manageEntity": {
    "action": "Save",
    "entityId": "1191625954",
    "entityType": "Track",
    "nonce": "0x60ffba6aaf494fe3b4424d43e68add0c74f7ab217023a1095acd161fe8a56e99",
    "signature": "0x3baf5769985085cfae82e6a009c2b8b1e2bed750764e365ee96e32037bf9e13e7d564827a3d18e34b01a9f9ba78e55e29adb592f6a0795ed1ff9bc577d8aa0591c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}