{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfa42cf92446233952a9193a3d351179eb5593c274f95575944f72e50a0ac03ce",
    "signature": "0xbecc57dc654af4120862b4338f31539967c34ef0238dc9b75be1238f7be37b1a204de1334c842178ce14bb1fed8f10151e4b4e2e404e7465861cb11a652593bf1c",
    "signer": "0xdcCeFBe05aAeE1a5851E9BeF4C40f35e25CBc1d7",
    "userId": "535741680"
  }
}