{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x109182903e573c5ad533326661e14367bce5a8d0d6320f21eea81a2794612391",
    "signature": "0xc13d0558645e4399568b7b8694cf16b8ed2ac6a8964370eeb1eae869cd20ddb953ab36271d72b86ecf021b7f8ab14e613eeb0822183f631c8dd6a2952aea999d1b",
    "signer": "0x44f05aF7A6aB16944cA066aC4A1Cced897279fb6",
    "userId": "256987263"
  }
}