{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf2b78d9b05e58c2193796e5f018b504be329309964e4b6b25400f76893d9401a",
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    "signer": "0x4f47455CFc3De025Eb8020455e21493Afbd9E4ab",
    "userId": "75936402"
  }
}