{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605088157",
    "entityType": "Track",
    "nonce": "0x269c6eb642d81ee159fb88d8548d9944c387aa018f15c82d0e6cb7757706576a",
    "signature": "0xd06e543326d104ef8158819e13bdfdc893a66151b0632000426fffa561fa4a2318d39ffd18159e7a7058cddc84784de0289814be1c497a47b02fbba0acbe41641c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}