{
  "manageEntity": {
    "action": "Save",
    "entityId": "253194319",
    "entityType": "Track",
    "nonce": "0xb6a4edc58fc945b76b4b95d2127a96c0421438acbab8d10b01ff61b3ce7cadd3",
    "signature": "0xd9dab713ce64fab5864c5a53811c9d7a7af43f34db9ec4fcf14aaca4612a38c56190ef424efc64b462b6fa91da5c7ecbc9638aa19a0636a5a95c9b62ffa434311c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}