{
  "manageEntity": {
    "action": "Save",
    "entityId": "131483470",
    "entityType": "Track",
    "nonce": "0x85e1915cae4b5c82efe7c25b3992d8cdc7579d2d08d2c66b2a10e079dfd4ddd4",
    "signature": "0xf3509ec029969b1d0a18440492e868ea42f888d327db934bcdaf33d0acca8bfd1cf15f06ce7c8f99172d57a340564b5584aa5359f996382f706cca848490ba681b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}