{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x72b3d896badf595c515227a130d55f48b283e25346daee6e217f50ea9c48c9f7",
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    "signer": "0xfE3c757e8C87133a9b34817c2C0Cf95daB567C83",
    "userId": "669595092"
  }
}