{
  "manageEntity": {
    "action": "Save",
    "entityId": "989976088",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x16856902f421a813bd0496510443805e1783ca227f42ce9228e7f70841cd37d3",
    "signature": "0x1a0d3cc291402d2633c7789c37ca04bdeec196601c5a00e91c3e860ba69d0cf505d2caf60eafa57bbc7ab12e4e172e961f0f4ec4217fbc6b6916f3b0c0ee68c61c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}