{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xff1b65bc6ecfadaa06c95faeac228ff07d735438cf9c76365654dd6cfdf6d633",
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    "signer": "0x877d1EdD4E404E689cd42061d436dA9fC40aFFE2",
    "userId": "9482017"
  }
}