{
  "manageEntity": {
    "action": "Save",
    "entityId": "325139",
    "entityType": "Track",
    "nonce": "0xc65cfde1c8106ed1a67af17a0421e4ad6a899b1ba49175a7245fe0c36cee7acd",
    "signature": "0xe58754121be28d743137fb570d951e299008651227c0451143ef153bd6b8b8144ec8a5cb5ade19a4b0662def0077b786793737820b4ba45a4a6cbfb3d45db65a1c",
    "signer": "0x672e9a41a6b972AB2eD6BEB1D4a6e4F09dA4C9F5",
    "userId": "302680854"
  }
}