{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699130052",
    "entityType": "Track",
    "nonce": "0x4811fc516b4217a99f3d4d952fd434edf4fcb751684dbbe006a41a5c35146825",
    "signature": "0x80b0ce8eea097495510a31fd10c8e6bce2f71204789b24408dc1f16ca6b21e04092ed60146a3a425d1d4788ce71f2d7cf198b9d9eff8d58a505580ee8ce7a6cc1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}