{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3820ec3df9f027cbde2a87208318a5ac49424b64601a23be6ad97f8f0afbfe22",
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    "signer": "0xAE283d08858D5c88B221DBCD7a091BC1Cd418D8B",
    "userId": "982175968"
  }
}