{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d8d9fe8098063ee8e376631105373a29bf28b3ee07f4292b5f146162205caa3",
    "signature": "0x1e24b7ee4e98b2899fe416a2dca3f790949a19d9ccfb581f80ee1f7fdafddac97bf2a3a3c672da006d48bc04cc93bf4b95a886d830fa2ff3c5e9b68ca69439ad1c",
    "signer": "0x0080a3F9e4a8408e4c6de08e3f68c64a4B366F1B",
    "userId": "738489255"
  }
}