{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x56d89aaef98a2489650c761e4ecf0080aacd8b255152cb52e6bb9b509fc6ec59",
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    "signer": "0x597338d86Eb5c539F4678517C3412D367F636844",
    "userId": "589368336"
  }
}