{
  "manageEntity": {
    "action": "Save",
    "entityId": "220818",
    "entityType": "Track",
    "nonce": "0x2706f150b7393e5a9b94fd9dfbfcd03b4b5a517b7715b6cc0ebf4f90a41887aa",
    "signature": "0xf50ebb50db5d505d8c42952e704ca434b649b44e4cf4d68b811f4d187e9cf6924cbd06e11cde6c87f44c2ccde742fb97c46b13db046f7c861a6bb7aa520a05e61c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}