{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7cb9ec499360d2987121ba2ae69a76b50777bce1532c9b1a8441e0f8635dc0da",
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    "signer": "0x7eeEB69a7057638032B176106b42111548D364DD",
    "userId": "66074400"
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}