{
  "manageEntity": {
    "action": "Save",
    "entityId": "298328",
    "entityType": "Track",
    "nonce": "0xabf56307a910c02b4f7a8f54ee1475f08a9c2318e89150f754c8e29256537d35",
    "signature": "0x89e99f885ee456fc36874e3dd45f9fd9b6e081f179c142956540edb2c817687f5d64274b9c8b14155b3b59daa536a1669351f4b38a99a0d7b63c608df67919991c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}