{
  "manageEntity": {
    "action": "Save",
    "entityId": "141020",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf95d4c5422255fbb896205a70aa296de8240f31519ebc12d214307f7ee967bc5",
    "signature": "0xba222ce42d6b32bdb81cb0c41a4806dcbc9daa192e27eec9b02231863665faa55bdbe554d193d0ff4fc3d55f56d2bcccd11bb6bc9cfa842ee0c8667ba54a80181b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}