{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc622bda2542cad4f02ab9f06f2f5e3bfce199c634499f196b2bb99726992eae0",
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    "signer": "0x9dF138917EadE34623A5056348b85D88c667b62e",
    "userId": "810972671"
  }
}