{
  "manageEntity": {
    "action": "Save",
    "entityId": "323961800",
    "entityType": "Track",
    "nonce": "0x52aed205342d2249afb9e3e6c9ae366d1a4d2257aa640011933326b96b317ecb",
    "signature": "0xcc94c7730faecee6a5b9f017ed9a68b9997dfad9b7a22486ede27c2d62e58a8855470e3f1ed37489d292f8c1eb29a1f622196f62061427196934e7146aee77301b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}