{
  "manageEntity": {
    "action": "Save",
    "entityId": "336104",
    "entityType": "Track",
    "nonce": "0x3ca6dfbee4fc9e65f718714447f8feb12566ed9cbe6e371b6853b330899e2b90",
    "signature": "0xfb4833a1f00e950c0331d867dd7ee5a165f3af542d2830c12c90163040bf4ea3407570a99f5ede6b2190adbf2c809198280ad454a5e53c8e3c4edcb6d42721391b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}