{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x233271260bec33ee755c07e338c3c71d33d0bc9c9b548c5f3e050f7912e68a8f",
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    "signer": "0xf1f0c8378f5B4D18702993e3A161e6AF470670df",
    "userId": "765583894"
  }
}