{
  "manageEntity": {
    "action": "Save",
    "entityId": "164761676",
    "entityType": "Track",
    "nonce": "0x03aa76cb481277790d80f0d91b2d83e66370d0387a59c8a705fc582e076c07f5",
    "signature": "0xa75f113c5285dc3438963b37fab7a6495124330574792cf5940b38f0821ee01c7f79de35c411fffd5eded04bc5b753c53ee1d16a7da12f05c73012f71e8dcfde1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}