{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2182ab9c5d66ed16cc105c74aea0321ce7c50d987c01166530189dab679d5ce2",
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    "signer": "0x920421Fd77D20d7FcAFc7034878a08C9a16f413E",
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  }
}