{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3016b34addc5db88153bc78efac269a2fbcea4e3534cf30e943fc39b3c360092",
    "signature": "0xb93cdc3b3f2bafeee8a8300e738eaaa1cdfe3fc0e58a06b38ef1737f6edffeec2c8570229dcf84b4b4d831144f07a0ade7db5b13251aa0282343264e7f6d70e81b",
    "signer": "0xe7dEcB818fCe078fcBE1bDD38AfdE42155dd2CF0",
    "userId": "395698740"
  }
}