{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8d27a796c0747a0172e900ee8ca6e9b09c1a1a16979f16f3aeb201b3162358c",
    "signature": "0x2b0a0040a4e79d7a8f50c4f8e49881bc3e8d06dad37ea1d25e57d4ebb0a496424c1e3def618968249e0f3d196a51b72a75b853c4890c0bc18cd92a487ec299531b",
    "signer": "0x1343A447A63a7cc266b1d037824899a8Be31Ed83",
    "userId": "569171717"
  }
}