{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x68eae32d52dffe0fe971ce40557eb66b63e5d1778e6cc342f2df18907ed03502",
    "signature": "0x206aa1f47d005df5f9479f95c8cbeb30b929838a0e5e0ef0ba40703a8b13e8d17cbafa58575c307221fe5e9b45956eca1881776561b736f633457a67393490b21c",
    "signer": "0x6f17b2b67f60B3FAE20DEFd7aF81DD4Bd693EDe9",
    "userId": "654634232"
  }
}