{
  "manageEntity": {
    "action": "Save",
    "entityId": "999127933",
    "entityType": "Track",
    "nonce": "0xc5a4566d46e165d008d558ac3eba482bac2d445d6b79e38dc58c00f6ef8f8e49",
    "signature": "0xebae9d2ad8104e2f60fcbb3a911ef6126532f99275ff576975d87b29517017b3155c61950cadbbaba0a84c0b5fa02d9892f6fb41985b7c53aed7d70f7ca65abf1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}