{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8cfbc25922cc3a417eb1d456f0425ef1b1591e57da992c7c57b26091c584dae0",
    "signature": "0x5fbdde270bf7dd5abcbb1f442bea77aabb3a2770536adedeb7542c046b4fe6b67fd810647f9fea16d952ceb39c54f5330de8517bd1613babfd0a3919b505730d1c",
    "signer": "0xD2eF9adE0816c6cc6916a009B787FEE1eF7080d5",
    "userId": "395415088"
  }
}