{
  "manageEntity": {
    "action": "Save",
    "entityId": "54425",
    "entityType": "Track",
    "nonce": "0xe69097cb120d6980ecb72dc58a8c4b54d3f0ae1739d24bf25ee1b140ff0443c3",
    "signature": "0x32b84784eb2d11659feaef379bcef5a18f7c26173882a949c67126c2f446374371746a123e652f799c8489846ea872ac866a6dfc65051a75354822237786d7f51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}