{
  "manageEntity": {
    "action": "Save",
    "entityId": "349595428",
    "entityType": "Track",
    "nonce": "0x08d6c1e624bee57b60cc02cba728c63f290a99a06aa0f3ea3b586fcb647ac63e",
    "signature": "0xd5eda9254875398a03199dd05d54f60a8b0bca5219b4a09d5dcf05052fa1d875171f3f0680e8646114ac162b8d08db29a19d0cae7ad87fdaf1bce3cd748e46f11c",
    "signer": "0x28Bbb53f14b48eE811b10fD56903fc4D922C6902",
    "userId": "625201833"
  }
}