{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7a41ffb0d498759e49c99129896b38189b1c0c9f8c0b9111a352437594dfb531",
    "signature": "0xfef6b051b097f24c9e1df4cf3c603616a945dc60d381881d0985bdb5e1045360684205593215fe431cde4d1ad9ca7d00452ae26327ed51f84aea4e6089ebbf0b1c",
    "signer": "0x1c80cC98C74244e7948218ba5FbB59F473A71A9a",
    "userId": "214620030"
  }
}