{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0fe45d91acc793803c384cfaa243995603f86658c10eaacece0e47acf060208",
    "signature": "0x7c85eae8b66e64f17823dea998e5e09da4a173d0160b05eb8b072a7b7d43168f792d2c7e75fd69fa5ee333ef05c909379453de5858e75278f49ddd1907d701501b",
    "signer": "0x8bd5c03298238332f393D0373090CA1b27A78DC1",
    "userId": "362760707"
  }
}