{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfa36700723b8e679502751d6db66df5929f95cfd3b781b48145a61ad4e9b594b",
    "signature": "0x17823b735e6ee5db38239bd8ae01e655ac1878e316f1722bbc1e84f6c19ef96d75cf377823db2ca179926f47af623ad020d522786fbbfa03e50d191fe462dc0b1c",
    "signer": "0x37078959e8708e75303c5386562E052FCE3c1B1C",
    "userId": "446684277"
  }
}