{
  "manageEntity": {
    "action": "Save",
    "entityId": "1890174131",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8ccd1746a8c12bafb79cd74da0e8a77acbbcf8d0f18d006cbd56f1114931478",
    "signature": "0x8d4f5522bbd5fe8d5951c49b9245d460dee163648318a86adff18e82c7bea23417aa5acd901d62c45aff4ed7480995f398818cbcfa8f6c8b4f77a507711516661c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}