{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd00310281c74cb25e4a6b3cb2d3fe540b483a506f4ab94e0c08a212d78da5fc4",
    "signature": "0xbdafee566b987bd25bf2256bc1a6fd503be2a038328d42b96717c789218d704b76cff7ecf9921fb2d62b27f29b46d3ccceed4e0657045f74e360e11fe05195fa1c",
    "signer": "0x6Dc1b05d6fbcc9EDfE1A519C3E0A2B15625A3597",
    "userId": "1846049"
  }
}