{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2755be5daa202faebd5568b722c4e5d6187d5bbee24a6557d9e2142b3eba55e9",
    "signature": "0x65d9f5fa97e2e6d15cf4df14c534370c533065f57e5b1df803a3fbe2f51aa19155cd79613b61a884a39043be7cc71b13c2a6dfcd76cb3246a1de0b7f92b9ef8e1b",
    "signer": "0x2b73DC8eE88deA3a697F6FD4f8137b517cB5ACDf",
    "userId": "895838027"
  }
}