{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121962",
    "entityType": "Track",
    "nonce": "0x5cd92ab17ffda91f487db27dfb7ea3788a45ad362690c47c842a5a04f19f64e2",
    "signature": "0xc9cbea2faad28b0f613c92e5f252babcbfee4e92f5235779765387a7d546413e08e936761c982bae396f830e6367475d941d4172a7720f128d42001bf35a41c71b",
    "signer": "0xCC89cD92c6e13cFe8FaD7993190B2DD0899Fbb58",
    "userId": "780759970"
  }
}