{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514967072",
    "entityType": "Track",
    "nonce": "0x46bce8f666e7a08a3c44d3cbb0a7a7ba014f432e342f7d1c2058805ebf9044cd",
    "signature": "0xa899214eb287d710cda4f7f6d0ee5c6369cc6a30623e0609445ced7af9f9578c21e896fc235a2084b66131aa484065bb315ebab2828f29ed24398f93d9f302571c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}