{
  "manageEntity": {
    "action": "Save",
    "entityId": "138243399",
    "entityType": "Track",
    "nonce": "0x3001a39a14cfa21ea6762837cd5e6b9ddc347deedcc08a7df6c533d0bab2d0ee",
    "signature": "0x75dea34eaf3985eae2ed06291ac03abc428972c9ef12e01f766bad6ce3f1feef7e4f4a1caa191d7a230742779fd3ac1b8814e0dafa383677a339648f7830b95b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}