{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6f7d727fa13e7e06da403e5787e47482e2a0e99ddf1140b24916a496f54bea55",
    "signature": "0xc757cbae805610e0f95f2b6cdd56b0173aeacd963ab4189f9667f118d14eee037f8f67a88efb6d72a34fa0503b60809f01e188c21d30697a1ebbf8c16fb21ee21b",
    "signer": "0x4379915D6BBCba4E61e1174A11BB24041aF0cb52",
    "userId": "583500920"
  }
}