{
  "manageEntity": {
    "action": "Save",
    "entityId": "881617576",
    "entityType": "Track",
    "nonce": "0x5c32d90b68eb35555fef6beb15dfda0c9dbe2a884f053b066ab433e348ee2f69",
    "signature": "0x1078e19b269dd9b8e2397595ad460893c52bce210a1cf9da76febf77b9f3b3c92ff89a16a1c572540e0068eeaa88af3bac7ec6f0a4be56ec4542cb3f3e64488f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}