{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x26a5e60f1fbd9c6908a81c974ca57dff96e4926473415a27c8b77248c6d09d82",
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    "signer": "0x215b9229F9cd650Df3C8D6f55633614FF81314AB",
    "userId": "646988261"
  }
}