{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe82e18530a4f671d0bb9a8c35a4a9100606e4d2ae0b4b413d9389c2ba67c1bbc",
    "signature": "0x15c0ac1e82148dd31d1fc4e76a27df3610d6d06f040de8c065a3d93b102aa2076f81f57843d963b73de97d42f899c9512a52c73b2caa09391cf1ad517bebfe1d1b",
    "signer": "0x92E6B036F6E4483CE572bc36Fa0d8D832113eD4C",
    "userId": "641379477"
  }
}