{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6ecbc37de8f3a091f232317450872de45e69e4ef831ec85088a94d81bcd1e689",
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    "signer": "0xeE668EE089Ee648DE5Ffa964C4832e855f35F0C4",
    "userId": "551130365"
  }
}