{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeeceef9f7e2213699ed8d32ca3d8d29db2272ba35874cb3f8f7287184dcdd06b",
    "signature": "0xa5519beb5fee1edc9c3707f9b5a0853e77f91cad0a6f5b6d3f47625e46634c34302f26ba7e73d185d95763e898dd5f58f051f700e3fcda1177fd49b054d095ff1b",
    "signer": "0x63F2eE99c7dF8018FbdBD49a3b72F1FD758534e7",
    "userId": "795581772"
  }
}