{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x199978e6bae52623572688d9a6fcd634fd3910198af9372a7137e3899c0a642e",
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    "signer": "0x0446f07Da6e575Edf706e77210c6F97E959f7Bb0",
    "userId": "998728581"
  }
}