{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6a0215bd9f5b393e649c464b75812df9da1e0530f554fa3f25e4b13a4f422bbe",
    "signature": "0xd208080377d65305e672291268f6094b5ae66787c39cb53572e12728910db5b06d0625794e0c8f32c44449db24f5f886b7d2932dc284e79455de68134638f1341c",
    "signer": "0x553e4A35dd873865028f618180529C768f5b9B13",
    "userId": "759135978"
  }
}