{
  "manageEntity": {
    "action": "Save",
    "entityId": "1202059635",
    "entityType": "Track",
    "nonce": "1792510725682938967",
    "signature": "0xbf64aa3c07a2513e72609aea7c1037ee28dfd9574ebdbcd9fd26c68dafe447765eeaf67dad506344b8c17fc215c16055124cce96503022bd71343174e7fa0e2b1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}