{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285251961",
    "entityType": "Track",
    "nonce": "0x64ce63c47d1ce847459362857e439b482618f8040e17d513ceb1583ee4ca5be5",
    "signature": "0x4e24ac1556d1e0275e192807736dc7e1c512b3fd2e81beb436c08b89c018e20438f7be6ae6f4c141bb5be348c3a75884fe6f49adbe51d06f8d7a5cd8a53ca3981b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}