{
  "manageEntity": {
    "action": "Save",
    "entityId": "2058648163",
    "entityType": "Track",
    "nonce": "0xac1ec1cde7a9f425a130d07514588ee4dc3cf18d4fd10bda7c7175c8da28544a",
    "signature": "0xfd1bf71274bbf08c43e4213036a78ba1d5476c44e5bc639cd60fe8344b2473606959f88c53cf2159f178402bc23d4948bd7dd3502917b934497ed34709a700f11b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}