{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x97913d9c160b158a0698ede5fb196f00e0353a1ef5a88638a79849031d524324",
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    "signer": "0xa7b95AB43281D33147C8dA023e6BC205D41d821b",
    "userId": "506460249"
  }
}