{
  "manageEntity": {
    "action": "Save",
    "entityId": "983470",
    "entityType": "Track",
    "nonce": "0xcbdae017c54eb03b6efb65cc289bf72cacf301ab7a2b8c0b03080fd12be37d8b",
    "signature": "0xed1a7da666b30f96802e26fbeaffa0398e09b7b9f3c0e8f7988204506edbf41847fb99a176724a47146c0f867ac69b36d17e739f851ff84b26e3547d49997c691b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}