{
  "manageEntity": {
    "action": "Save",
    "entityId": "1389901417",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x014736821bc26db979a6ee2b168d45961aebdec20b8b4b9994d14c61f051f4ab",
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    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}