{
  "manageEntity": {
    "action": "Save",
    "entityId": "642040232",
    "entityType": "Track",
    "nonce": "0xf4ab5fb9860d5672e0c9e149368bbe5e0d75ceffaeb3f6f2fea209137d4a09bf",
    "signature": "0x2bd3810539d4c93f3c8b1ca49a78f139fc518269c62979e3a6bfaffb89eabf7d18966fa50654ad5f4e83f0ef10b81bf9ae006f94a10b508e2ed9ae1871e6a3ca1b",
    "signer": "0x61C76C4Ba2B5e25fe39F45EF86dbC2749f46d77F",
    "userId": "183994"
  }
}