{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d4d4fe99ff3c8d9a1fce3f02caef8d08da6ef1bc78a787938298c45edaf38d4",
    "signature": "0x16a2d84728ee1fc03588ab08b06e686e67dbcc48efb7f2b6f869c09a69613b0f6e75795477df55ee64a2235ea0159a7c3ce622cb98ccc258ff31171b468c79031b",
    "signer": "0x95039C5e9fA958bCe7C8bD76e20eb23F4E531e54",
    "userId": "708281325"
  }
}