{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1a17207f608f02eaa7dc38faaf6ca42b2f5e0c843a177069e16fbd8cf50554fc",
    "signature": "0x674b54d5eb65d7ab9306fe13ea2a7b46a67c14bea23aeaf2d8a61b91602d40305b754fbc7a8fccc8be42607a0461efb327388f67e5a602a9f8a8d4be015fd25c1c",
    "signer": "0x9B32778f2EDac6d5b8BfccEBF5594cC72d68cB57",
    "userId": "847013225"
  }
}