{
  "manageEntity": {
    "action": "Save",
    "entityId": "814022384",
    "entityType": "Track",
    "nonce": "0xbf4a47b4f113f5f3853a924b8986161470289e35fe68d61a19be346fb545d2eb",
    "signature": "0x1baedbd54b571ffc363265f10108a9610d11413c25825609ea0644e5cc1cde9377c7fb0a7edeaf873a66f2ef283dd1f6554f3981509a5ac2722574788218daff1c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}