{
  "manageEntity": {
    "action": "Save",
    "entityId": "468130493",
    "entityType": "Track",
    "nonce": "0xb8a4799f65c0852c32630e4c53584d15a64ccd783e729ec900a65d703b79f2f5",
    "signature": "0xfe69a8a6865a6c4746f80dfe08dbfe507222ea45845ac35278b52baee7c0b58414793f37182df1af576e863f77f84fb3563a03dbd258ca937a4bc0b8c093d4731b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}