{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2a5ad69132ca43bd7a788a0abcc121559e2dbad3208f0ea993f8d4289601a702",
    "signature": "0x0b2df966d5c9b0254dec643dfc2d4ec77c7de22dac5cc792d584ce49fbef38933b3a3a16d97edd5b83923e2474c30869f9fcc51550f5cde5bcf8191f668b1a1d1b",
    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}