{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118919924",
    "entityType": "Track",
    "nonce": "0x9e58b176c403eb02757bead47b904c7ef231da5f217aec88850a98b5f9a8b6f8",
    "signature": "0x5ad90dd5d53e257f62a00df9e8ef512e03f84646a4d725f851d28ecd7e6e5bbf695ca0619e7335b98e84829bc53f2981e2724776d8557a7c48f66818e0a48bc21b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}