{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa3241134273b4284a3eb69724add9bc055befc57388bdd32a6e965fea31ad4c3",
    "signature": "0xb3e02760ae0b773ce42457395d4b796ed3d0937353a230485d5fb95a24f5a92410e90b62b1f9869d7923afb5b7c8adf5228a797b161734a507f01a35db078cc21b",
    "signer": "0xC8D8D2740d15d06054dd962172A6dE57b86987BA",
    "userId": "928026347"
  }
}