{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x919812a7d606afa479eb7edbea76722d5f23c58bffc3aca76049bb84371bc5d4",
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    "signer": "0x4FD7Cf7D634F5F26e577538A55E55eDF91665C01",
    "userId": "106462805"
  }
}