{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xab7714297fca9f9024f042876b50f84847290e3755f8e1359229118fd43bbd01",
    "signature": "0xf6247ff581cd7cff09f8faf1faba1f9d9b48913b32bb501b7aa360240e35d4354ecd03e03b0b45c424d0d08f3d07ad203ee79591dc3873c0b1fb0507473a3c291b",
    "signer": "0xC276fF68426672F516C841b992c54507ca235637",
    "userId": "382050600"
  }
}