{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244495956",
    "entityType": "Track",
    "nonce": "0x0794b3e4499fdebbbc3ef397ac5502626f3c588e7b895c98e54becd277cd6332",
    "signature": "0x74eb36a53c5be50c4b6d1992db9725136e4bc8a02603dc623920750d407e57ef543ad21df6d124db64809cbdee14cc58bc35d50d5f2b47a4db2c78a6d49455c71b",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}