{
  "manageEntity": {
    "action": "Save",
    "entityId": "113673845",
    "entityType": "Track",
    "nonce": "1789042895967432876",
    "signature": "0x6c5967f466c8d90933ffa19df324bbbab3040e4bc459bd94f45dc67d65cb258808ed3ecdfc44de98df67eb0377a3e1e3abe7ba92eb332dacae5f0a0d5426d3961c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}