{
  "manageEntity": {
    "action": "Save",
    "entityId": "599122109",
    "entityType": "Track",
    "nonce": "0xb119b06905b44d250c0bdf123489712f6a38c0b489fdfafdb692aa358f0bf3fc",
    "signature": "0x8470ca24b04a17358691574c032e6bda613dc3f0adef10b4cdf62c5f99a9314c773a538d7acfc10039f1efa0788eb51885c15bba2c13c0ab8a13b788bf85e4541b",
    "signer": "0xAAB9cff3D43A1b095421916d4C7D864d657286c7",
    "userId": "435031315"
  }
}