{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5cef54a56014c9b468a53d05a8a19e7c791456dc5b556340cb3304c0259189ce",
    "signature": "0x07670b23f515cde4431964197707e4b60b82c571b36ccd4f1ec1bc2f55d026e06a63eea1ea486dc9e42b5f81a35bf98a6afa9503e0c663be1137108384e75b531c",
    "signer": "0x5Abd987043421674d602889e59Dd88Ef78bd2f5B",
    "userId": "408164008"
  }
}