{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x210914b4b83eebb64299f54f49cbc0dd7d3b671e92e4e055ab8e428532e61b26",
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    "signer": "0x5C07E6dEF1CE3e13F69d1F6cE24aaFA2871bb130",
    "userId": "547554416"
  }
}