{
  "manageEntity": {
    "action": "Save",
    "entityId": "411525",
    "entityType": "Track",
    "nonce": "0xf991fb109ce245b193b11caaec387ca64eef6d9d1816bf27803d3ee41e3cd531",
    "signature": "0x15029979e52a6a8484113c5dee96bfe7dd7ccc3418bcfe3df27783a57df21bbf1a9f122071554122bab7573b13795b01c1dd21e7a5205cfcda0ffa66114a772f1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}