{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbfb18242cacdf72360e02fb332c54ab1d381304af097a4349694f063029c5796",
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    "signer": "0xFB4709d030b720ba13236C4B8baB93c3db897775",
    "userId": "954109466"
  }
}