{
  "manageEntity": {
    "action": "Save",
    "entityId": "353588178",
    "entityType": "Track",
    "nonce": "0xf1fb598839f9c2666996b3c4b1ced90f70b6283cb30336bda41c16294b6781ea",
    "signature": "0x0947c826675a5ef3c505a9fa53168b6b1d0927914f8e14b31cf0bc3f6b6130a31dd4f75759fc17e62da5ae14379f6ad67dd7d081c95dc26be076919c653b31411c",
    "signer": "0x7B3AFAc08245Ef9d1CFfF7f7cdDBCAADE68f94E3",
    "userId": "230426"
  }
}