{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4c2ef0b9e39dfd290e60c9d1e51061e5b956b8c1f5292bfdc71e102a0d6ee7bb",
    "signature": "0x91c48462532215829fd423af85e4bad0ec80c25c71707a39e73d471c9e0abfbd613a1d9ed469eebce59aa7b37ff31399b6ed8debd4104be815c081e6a5fd6f321b",
    "signer": "0x95f852A4bf72042104896ef4Ca53c0429CF8d4E1",
    "userId": "797583457"
  }
}