{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcb71576341e177229049e7d8e5f812e488ca98188d09aa18f3ac8e4e3f15e5bb",
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    "signer": "0x641C4F359Cc69812c2fb696CFa36445688Cd1D35",
    "userId": "395775499"
  }
}