{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc5f6004a4ddf0a0206f3f4ce318607a05afddcd4d00535370223a44a363b32da",
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    "signer": "0xEFbdED17B2c3201ad341604DFa0b6174C562Cb05",
    "userId": "951908954"
  }
}