{
  "manageEntity": {
    "action": "Save",
    "entityId": "231318741",
    "entityType": "Track",
    "nonce": "0x70453161f9be973d5f8058cc0d35a69d334333c24b6cacb99be9561c7ad18fe1",
    "signature": "0x47f2ac932da7231394f307de92f2f0ef834dba5e932f6113dae3e23079dcd0c54f29f52c9ac15ac8b347533fcffa0f903a667c5af3b449a690c02a83c5038baa1c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}