{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3bfe9bd08b23a9ad27bb75a7d0a7a3d6a1765d4ac21954c603cbfed5e4d1e0bd",
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    "signer": "0x6F41AA445440dEABD6B921ffaF3e9F76138B658e",
    "userId": "155117491"
  }
}