{
  "manageEntity": {
    "action": "Save",
    "entityId": "293123000",
    "entityType": "Track",
    "nonce": "0x46e429a75f4dc0a66d6975bd3d7193f1204b2903a4f4f7ca9eadf0ea554335e4",
    "signature": "0xb37b757f553806539735fc80a5283b38c77a267c5ef3aa3dacba3d8038505ae90ebf338249006b3a994c959af3c79c6e4f2e3276aae7a622f5efa47de0b753c21b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}