{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x937d2f9cb7754d141c081b6d8595aff6b8000fc959fee2a967f86e09a435fc86",
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    "signer": "0xDaB063e2eA8b5fE5C0Ed7223E3ae78f65634Bd2D",
    "userId": "280447001"
  }
}