{
  "manageEntity": {
    "action": "Save",
    "entityId": "727125880",
    "entityType": "Track",
    "nonce": "0x33ae2f166913bb8eb7cdf98e7a49f96445e1f78df165fefbdadc3ccebd98ca14",
    "signature": "0x266a7aa613cf107be671f3b09674ca50ddc60b9a8ae18d80c2d9c78fb2727ee633dfe1907b7006fd961a680e52e85de99804eb44d52cd395884f480aa8a60db61b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}