{
  "manageEntity": {
    "action": "Save",
    "entityId": "538037690",
    "entityType": "Track",
    "nonce": "0x8e33ffff6ed94417df3dd6d433cf4f244642a6c621b76197a7472173b1437448",
    "signature": "0x0b1390398b4e2643565e6596cad6ee655af85b066e4c93fd44ad75ea84acd7c85dafe3167bc6274429220b24d9fd4322ae14ad6a779e93c300ff4dcf2c0cbd301c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}