{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x103d0e49f8c0e3903dc9c2ea53d7b8cf0f9de443b176314373eb5a762cf2008f",
    "signature": "0xea431ee3f9284fa90229fd3f26c722128fa0cfa78c562f696907e8c6db00f198320b66aa9bdfe15a98b0713bb6e9d7a8f5b098fbfa6a3dd5135a4af90bf65f401c",
    "signer": "0x14ab7027c19a202dbEA7a9218aa291D424d901e9",
    "userId": "111579"
  }
}