{
  "manageEntity": {
    "action": "Save",
    "entityId": "536988672",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x17c283dcdc264f021f04b051775987855e1a930c1191f2a883baac11debc1f29",
    "signature": "0x0f082fdc4e0bddc2a657ea25ea5df13498408d12f537ff1566ff7b313d1db7346fa55d56a0dfe8dce979943797d097c589a30b89bce7e2529b3227767482a4801c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}