{
  "manageEntity": {
    "action": "Save",
    "entityId": "514424",
    "entityType": "Track",
    "nonce": "0xe9657be82e7792067da92378ff886b4c235f415f3d5799e9595b4cbb7bebfc45",
    "signature": "0xd6dbc0be7b40954f19bba1b61e9a8ea8963e7602e6ca4fe85918b8bed1f5c84b3bc183f0cc5868b9e87106d4b16de0e2e138d9b455c0fb7fde28b87720897eb61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}