{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa6000ca5209e2ed4ef280df64c0241bcab0d1ccb3354f192b317e283243d3c4d",
    "signature": "0x4cf93dc00436583195e6d39b89eaabd736c4538c7eb0c0ea8e9b848c1b7d2c621bc667143af21cf57ec055dc506a1205a3b422a7be7b29390266385dab1f88691b",
    "signer": "0x2A444Bb92dfE1aA33563161247b25Be9D2fD1A15",
    "userId": "276491226"
  }
}