{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x022a00fb583aa74ca8d7bc873677319d0a187fc60132cd599d0a9d0f10cf7351",
    "signature": "0x1cba93026fed8935195b401f740fc42e4c1d15d0c3144bfdb77906068346781774ccbe8e82e37655aaa0829ff976571e9f9f22771d02fb0af4b6ddbc53119f601c",
    "signer": "0xAcF1330412ae929ED0eab55ee4fD668A669880E1",
    "userId": "615925709"
  }
}