{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaa51e975c0345e898cd44ff0ed9b1aaaa90d4624e47a6f4c3ef14122db7e6bdd",
    "signature": "0x402d8c27ee14a0d66356cf153ca3fe028d1f153805f3feb73e2723672d837d0e178091dc8f6f49f84dc56a0e0e7fb0d6020fd2e5dbf9b151d525f61af45fd6cb1b",
    "signer": "0x5D33dA4294962c23DcAcF8A292aCc76C3D0Fe119",
    "userId": "758264219"
  }
}