{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaced131d6bd9760e393b5d70bd4b687832cb15d37995f97bcd4a534a6de8351b",
    "signature": "0xcbf019968018947fb3ad605be7715f44990ff3aebf2f5decddd5c17059397015572f4dd78d5b555030372d971b86310ba9df519b4d69fc5708fee31c4a4bfc721c",
    "signer": "0x8FFA2d9671e962b5161601870ED02b2B5C779DF2",
    "userId": "114949737"
  }
}