{
  "manageEntity": {
    "action": "Save",
    "entityId": "898270499",
    "entityType": "Track",
    "nonce": "0x5ee2829d252bd2a8038d9b2cd355a6138714f4b7deabdaa242eb9098d4cfb49d",
    "signature": "0xb4112b609a3a2b81d513c95f48388f03495d62110bae7ef418308c4a447a1204080fc4fd93bc7220e04f6b8737881a93e11090c3c4c6f800681eff0549c510771b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}