{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbc71f89427526fcd52e7a53cea41e80524592ea6a4eb77f8851375f1867d3bea",
    "signature": "0x8fecfe77f3c4600b34c7184ef7e349d6e44b7a9199629cd8134b6494aaee2ba5038ba266a0bd4bf0a31825772e30dd0db728390c83ac966f218bd1ab8d3584f71c",
    "signer": "0xfeBEE04516164483CF01D007eB79f7c798FE6244",
    "userId": "908487411"
  }
}