{
  "manageEntity": {
    "action": "Save",
    "entityId": "44634",
    "entityType": "Track",
    "nonce": "0xbd6d5f92fe35975156750c31d9c40e0d69c206044a2573d5c0b9d477d20fb02d",
    "signature": "0xf6a7cbd00e04b9017f045991049344cb77e3f9823fd4e387cf11b6d5f9fd1a0253de27b55e83c2f2d018d596b520ae527c6e4cbac25d3d7fa14fd06f2c6828791b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}