{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc17626f82161443f9a1f704039657d443936b989b714a20a21df8780248e61b3",
    "signature": "0x802768456558508b79f76b42a03f86a843aca6971d9a23681e1c49f9574a890b173a00033b57d631919f15f44ee95e3e1d5c9fcb961f73a55e8edcd172af59931b",
    "signer": "0x2966939814Ab7956eD0caADc32507f5Fb7298e8f",
    "userId": "921139103"
  }
}