{
  "manageEntity": {
    "action": "Save",
    "entityId": "836757648",
    "entityType": "Track",
    "nonce": "0x09cf4cdee3b47928137d9be5b2d2de98ac2b56326b9069af003e35c162536315",
    "signature": "0xb58c6110f32a8545838c2208bfd83c612046d20d6d3746a8bac27497c1c77ab5536f9675e72e95b531d82275ad25655e4bd1787e3d526aef3485ce9348d8c0231c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}