{
  "manageEntity": {
    "action": "Save",
    "entityId": "1403845152",
    "entityType": "Track",
    "nonce": "0x8c132b4254dd710727304a855da7d0c76d925a61a2cbe540304a3b528023cacc",
    "signature": "0x112e6f4271256707f623679d5a480c33046af687ee37d0a002ad5d941cd738315ae18011013e387236de846c8dbdb9868144763294cd87afddb7ed798b97dca71b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}