{
  "manageEntity": {
    "action": "Save",
    "entityId": "111306255",
    "entityType": "Track",
    "nonce": "0x7874edc5c18259581e9db909875e20f7e0fea802af65a1d594a226b9d4ec446a",
    "signature": "0x67bb73e9194167e9094cdbd6349f708eb036baa27d8d36a5fa728af7df51f90154cfa8bd2d2c5fa7564c1be77126d838f2c59763d817e04d49aa1f483dc6b7281b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}