{
  "manageEntity": {
    "action": "Save",
    "entityId": "9275871",
    "entityType": "Track",
    "nonce": "0xfcc1eb8fdf0583a4945fdc0ca6d99d2cca7ea556449be4bb3cf1bd02e2f8a5ae",
    "signature": "0xdf7758fb274ace024e6065af8f8a7d8e6bde4d58bc7cec821a0a55a67523ec3657af8ced5feb846d6b13760b0407e1e1356276acf4f47d161320a4669454e8cc1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}