{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5f793aa72e4462a30ffd4206160b06169ab268902d23ce4daaf7f499b5b47212",
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    "signer": "0xfEAfc71466E3F6a8dfa1458e7CF4A2b973Dd9f3e",
    "userId": "901626843"
  }
}