{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962804186",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xad580600171dce83809dd8faffc65aa0b19793f6bb59979428c6278b070e1c39",
    "signature": "0xcc647fe21f0825a5edb7e9b572c58a19e52cd940f0c119c4335c75a1c7bf9cd22bdbbd6a15465a5e906ab848d69ebd0a2891c88e0fbac72e05b3d4f57c7ea9941c",
    "signer": "0x33c702d534707f8Cada5DdD521C5900827973f1D",
    "userId": "5642"
  }
}