{
  "manageEntity": {
    "action": "Save",
    "entityId": "340492736",
    "entityType": "Track",
    "nonce": "0x5362005f96d0eeacaef827ef0ebf9a9614cdb118b4aca0301c3ac42c54eaee26",
    "signature": "0xb0b8dc2527b72232a2a25a7755ad36d46b16636422aa0506147d61b7192ab05937b5daf0adb68cfda4e1b93b017f4f773450029031e36a00d567b4329e6f7cb21b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}