{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc0db46f4cd484d96c260ed79cff3e8327f32e5af370e4fd66b7bc643fd6cd228",
    "signature": "0x323a4207625b91c6de67283f72e24cb3632324b0bd81d99aa03c77d413c5db0207a953c4e7f28729e506eb0a4166263dd4c38ae14c39990dc850f0c6aea332841b",
    "signer": "0x227cfc4c0d079aa632b32bB85efa344eb9D15ce2",
    "userId": "497088785"
  }
}