{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x921b48eaeb73eafca7b310cade43353ce8faabf6bfff6ab4c3aa0268d4dfd11b",
    "signature": "0x8db69fd8ec3cd49a622ed1e09cc5c2d3ac987f438c2c53df6e64b2324343bc920a905f131d960959fa60e76ef0fd7a7258cf482d76bff761aa713cbc4c77466e1c",
    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}