{
  "manageEntity": {
    "action": "Save",
    "entityId": "723335",
    "entityType": "Track",
    "nonce": "0x45f5b924ff6ad91b2add50c032f9cfe87eeb2e26b8c139b42558220756d38211",
    "signature": "0xf68e8e3c23c8bb371cf1dbba34a582ae7402ac1814a56e95d1dd67b51d6009ce4cc98e4f96be06ec889459f1345209e05db84cfee3bfc8bca26d367c07d773221c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}