{
  "manageEntity": {
    "action": "Save",
    "entityId": "377833095",
    "entityType": "Track",
    "nonce": "0x026c890e41b1900aee0f29eb0fd8a3211b968785a67d10b2ee2fc879e82f3487",
    "signature": "0x2061c7e816bb4e03b3ae26a69bb7354f2705a8b3012c8967ab6f86af22284ed24e0533727c555b19f5d61084bb444ebd0abaf37991f8783ab9644af1cf6a88641b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}