{
  "manageEntity": {
    "action": "Save",
    "entityId": "1219668067",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x75c13cf63a51d282f9f8cd8f3412e01c33a40ca477311e8b163f401811b1a228",
    "signature": "0xc422f6cb25f831f0a37e7084565c8fd0f664afcdf25ea95f199f406eb3d1e3f42a885c53fa24204e130cf2a17fd5f6b615534f602437017d2f5ceab40ea6e6221b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}