{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3cb23032ec0b91119e1226eba29b844475a9ed783269fc17aaf3cef7cab47cab",
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    "signer": "0xfbB9f279fc1A1b3699F4B8dDb0a0d0dBC6e1229F",
    "userId": "321170276"
  }
}