{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb9d70483ad97a006e7740d9c381a90277a1bf62066033d6eb4374d190da214e0",
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    "signer": "0xE7D2d2e0d0DdAa60c6A016b7271C1F9E865F5F74",
    "userId": "808443903"
  }
}