{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x01309bc49d676548cac9a142c7393307c6d8df1f41b1a36e275dd83909f9ad17",
    "signature": "0x6816565c62f79091d4af2c65c8343fda96ef6c655b26d1d10e815e768ee540ed2374d33ea85e9177ce44e2822fe78e5aac4e4d615a2dc0a7e886a3d3249e91871b",
    "signer": "0xfA70b89eceee2616AdA59B58615C6009d8aec0ed",
    "userId": "562544487"
  }
}