{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689157718",
    "entityType": "Track",
    "nonce": "0x5b06a3f63a003546568d45c7713bfe7570d18a78e44bb78c8ac94ec01c4aaed1",
    "signature": "0x94c61804723aa38b2e315de342c03636f72ec183697a95cff21a7cfbcdbe120753e4b38fa3b4fa5af898e56a68552020fdf17b1debada5d0cf444ae371fbeb0e1c",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}