{
  "manageEntity": {
    "action": "Save",
    "entityId": "1101956",
    "entityType": "Track",
    "nonce": "0xc21c137cb3649c02498b7373b7bb76ed2b17bb0693cfe665f641858b0329a0f1",
    "signature": "0x37850a2b93346f4906d7382adec6a92db846c687f6a0111500a1a4cc372ef4831c577814a17d8bbef36078f07fc5b079f6ac94c67b86f493b630446bea6d0e9f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}