{
  "manageEntity": {
    "action": "Save",
    "entityId": "753024210",
    "entityType": "Track",
    "nonce": "0x299d1bc32a42e3248f7bb0d77aef2d80f55d93c2939d743f06b19db8b847bf6a",
    "signature": "0x0937e27d18c2376bf510efa95b4a65c64e7f018b0c64330105414837022f3d4d7be48d14ba48bdd81bc057a20c0258346593f1617aa74db77c1383b5a965d6021c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}