{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe555da27ca85a7ccfb9601285d660b16157ed5110ae9496181f46b31b8ca17c0",
    "signature": "0xb1ee6681f95dc1397b396ee5fce894b7c12711259ab053535b7c9c72aa122d794128cb66f6d40a178aafb5a23a7264a294555c9abba3ba844c50bf48ce0706cb1c",
    "signer": "0xac1bbC4a7f3145F59532C9E32928845B71c3FB63",
    "userId": "246884598"
  }
}