{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb1d8dcfaaf3efd35ccdd337a3c9c0bf02126e46ed98356282b57a347b4b1693e",
    "signature": "0x3ea497b44a5d0f239faef486cf070d03c6a7469be5bc2d23dedf182222c721892ccd39a6865b2926d62c3b838f7ac19e6b71752b7aec93e67c869df3e357d2b31b",
    "signer": "0x02B1Df02df352354507f0E53a1ee270280c3e882",
    "userId": "509083804"
  }
}