{
  "manageEntity": {
    "action": "Save",
    "entityId": "264604124",
    "entityType": "Track",
    "nonce": "0x9d9c611c0d774cbf860d2d6d721a157f1c4cbe25a646ae50e9da9884c66c325d",
    "signature": "0xc229abc1089968f2d19a740cbfcc05d8a375e707b973133e070e79ad4687e2ed35bc1a3e1fdb21be2b073b02d255230e26051aa79b8aa75a17748d2f6405f2cc1b",
    "signer": "0xFb8DB1fd65218aF9818D8f59D5D31E81BE490149",
    "userId": "210545"
  }
}