{
  "manageEntity": {
    "action": "Save",
    "entityId": "138575",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x11c7e77c35d2f7f1e210578e5628ad299751221e217f527a1f8b518073eb7ed6",
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    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}