{
  "manageEntity": {
    "action": "Save",
    "entityId": "1668690477",
    "entityType": "Track",
    "nonce": "0xcce54d40f2e4358849afe859511830a6413b74041905587c7a77e2985ad90253",
    "signature": "0xd93375f06e5bb0a5341a44eab1e42e8bf6d8e6a97957bbb322e05bf3ddf8f0fc6ccb94dcb0142ce721156aaf9d45c5e38b6a3e55f312bf98ba1581c139515a631c",
    "signer": "0xaAB195cac4029fce09bd166F1546E1a76049c50c",
    "userId": "844451279"
  }
}