{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x129a4eb8e26678e007e504b6f39c040b678832967de8399cea19f067b43ecb64",
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    "signer": "0x433B6949BA291D415b88F2ae8168DC238f50e952",
    "userId": "452956272"
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}