{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbf5793e43727820c27dfe8c054d96bc7f381be52bf00823eeb33d2bf9af2d6af",
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    "signer": "0xF140e464284e38a817eb2D1Cc258c9bf93068853",
    "userId": "408163590"
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}