{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412202337",
    "entityType": "Track",
    "nonce": "0xc13179e337c54296bab633ba403318aa2b471dd8730866ac208845c79ea5f25d",
    "signature": "0x6a495256281a6baa434751d985fbcd2fc826d53086ae9fade4b62ced1fec47d625efcf65c3608e9fed3f7a52f801fd23dec1115e41341e3801f5d5e8b26a29a71b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}