{
  "manageEntity": {
    "action": "Save",
    "entityId": "540069",
    "entityType": "Track",
    "nonce": "0xa003b95cb5d41020c43bd1165e289e206ef4ded1650faa280195e310514ecfbe",
    "signature": "0x31a9f71081b5eba4c77919496b7b5e27e560db77ded251f4d809d50d64c093b53b7d764e5743701c03ece7b389bbc4b6abdf97e8fe63fee4b61613da35a8baf21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}