{
  "manageEntity": {
    "action": "Save",
    "entityId": "768075797",
    "entityType": "Track",
    "nonce": "0xbb9f811e7a7bce93430420fe0c54b67a41928ce674cd923a3aea942a46f35053",
    "signature": "0x4c53f93aa9a3e0056cf5c65c5c4b7dda47d77aa190843e603e4e6c79ac6974ef3e229222a7d52a32b53e5ec7f991e5159db1be8c3ebdacfaa2d4a4edc0afdead1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}