{
  "manageEntity": {
    "action": "Save",
    "entityId": "230507",
    "entityType": "Track",
    "nonce": "0xe52bdd79e496f578e85b696467f5e5b30c4bd166acd0cec490acccbb5d2d4fc9",
    "signature": "0x26139c20d4d47e18880d5ef7bff77a5c721d71e562ecc96986a79864483a9c9122a33135d9278624f9e3c7e157caf9238c5dc3aa18adb93747e5e27a90e0d8db1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}