{
  "manageEntity": {
    "action": "Save",
    "entityId": "402369",
    "entityType": "Track",
    "nonce": "0xd24709b6a5021b0d7e0b5796e632040d8a649609f392a1465eec0da890013e0c",
    "signature": "0x05e287555c92939ba0a76138126416a4210c19ab1820af3a32eabb44159761fb03161dd909f803e4dab78a5e04999c5cbffad8391c83ae20dbf9661122fba9791c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}