{
  "manageEntity": {
    "action": "Save",
    "entityId": "954467",
    "entityType": "Track",
    "nonce": "0x5af4157bacce354e6573ff630931c03f625bf4c1373edd2499283f8e1190a7cf",
    "signature": "0xed5469fa9032f748b4825ce4cd78ad10849b68daa52848b6e74996a66ff16d8e1e479299c177734bd28f22d6b301e21fdba62037045ddc38a23e873e1f3faa201c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}