{
  "manageEntity": {
    "action": "Save",
    "entityId": "318067424",
    "entityType": "Track",
    "nonce": "0x3ca0cf341d759748343e32c22cfdf22f67e71e07033a9de5cfe0a32708bab5c2",
    "signature": "0x4a277066108c7bf640bc5b7190dbcdc59f86ed72687bd0381365b8a94702dda71eb32bd87ab9b51aaf4c0c3d26505a8a7ff08631bb70d1436a1bca08edff4e881b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}