{
  "manageEntity": {
    "action": "Save",
    "entityId": "568996",
    "entityType": "Track",
    "nonce": "0x5a53c27798cd0e559c6e9881534f291d6ff9d7fa8800e46bfaa15e4ba333f604",
    "signature": "0x3f2d75bc3b7cc873bec748709ec14dc55c1e40400f6cd84d242d1c842d1d176f69c3b5b96f5e625c054e1080835046e6915ddcc0c226f8291d90e7cd66978f791b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}