{
  "manageEntity": {
    "action": "Save",
    "entityId": "561614",
    "entityType": "Track",
    "nonce": "0x47b7bf6f236ed584241af77e48990419cedec292cd1c681047afbaca59848919",
    "signature": "0x5759d19df1639540e6f1d18324c9b447a558776a95dd10ffce003039a3fabdf03c8465f63b2ebb3c85e171a4eb0e09ace58059e1681fd00b6e5673092bc408da1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}