{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67f55e109d47c78a15c583a9c9b8cd6f919e51eb058837611de61eb2ca94e786",
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    "signer": "0x05416cCb2565ed903310b8EC08Ed44f8a185DEA1",
    "userId": "122755642"
  }
}