{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7e3bcec930b41f7f2362a035e7f2725ae2f79eb7680abf6fb84b399fe1961254",
    "signature": "0xc56687c212cbcb3638c329f6d67d53785f461699f1d8a7015e42e70e48633a3c2795a4fa76d1eb0371d3dc40ba8714c80a3cce9aaf48fb4ac64ba497ef77c7911b",
    "signer": "0xC904b74a04E95F05A4CEC153C71EF75FdFFcD5CF",
    "userId": "962203192"
  }
}