{
  "manageEntity": {
    "action": "Save",
    "entityId": "847506871",
    "entityType": "Track",
    "nonce": "0xff1eedfb4192f5e7d29063cc7b17eca485847b143ad097662dbb75e5ed1a8118",
    "signature": "0xb364e2113c5fd4ac93d4e075a0354c2da9654235f9e4e491a6614bf60437e7de7457dd76814dbb9743d546991436a56e0d98d317cc0fba04ca00c65bb766df631c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}