{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb49fb77f2a059dd76f4ceb80646dc5bc34a68c398ca0a9f226d70689c2c15144",
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    "signer": "0xb29Aa5505Aa4cbB355fF711f0750e76506714848",
    "userId": "733746758"
  }
}