{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x73c170b8386000cdc700c3f9d15ece8455cc594eae17df62dd40c975d403a9d8",
    "signature": "0xe619cb78dd7024998f9b831d749f8288dc52bbd49e98af0a5f16e463e4371ab45ee2dad8b2a6efd1e316c16297c8695b7c49f727a45f528696f749bc6cd114e91c",
    "signer": "0x9Cc78eC75533CCe255cb0D64B87f1806EeF8C4ff",
    "userId": "537863037"
  }
}