{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xba0ad7b2d7d05dc484fed1c874271cd1e0553402419a68742ace96a66f66c056",
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    "signer": "0xBC607D243ad6E7a3aD451974f36DaB3e3B48fBdc",
    "userId": "28406951"
  }
}