{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfd68bfe8010bd88663478aa6ab6eb76eb56f72481bf8bdaef211f245495ac993",
    "signature": "0x48ce03415f9c47097a167295a7d84bf4dcafef2880c88985cc141a337d969e14143c769fe29dbe8cccbeda659fb4d2cf4e52383936b5b3dc72f456a875449c191b",
    "signer": "0xb1CE2f67A42674069F4Dfb34073e3d9DAF462C84",
    "userId": "977976542"
  }
}