{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x037e5cbf2442c897162e3ba879558e8b26320f00124b10b9bf6e6aecf6717d51",
    "signature": "0xd358fa573f1daf3e1b80f4b246b5824810759be02a59f05130bd79b1e317fb0b7f09c4a6944a20871e89c7714db42df4ac1a826cdb8fc640515cab58a6f9b8f41b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}