{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0e1792555eb21c68fc1e923f753541339085f917badbc540399a095d06d92d22",
    "signature": "0xeee069e26c7fcd8ae2b3d6aa904f2104474554f17a1e00711b47ff0ba551981e1917e647264a03fe995f6e5354bc376adc76dd42ef5a2f72d00082a62f77c7381b",
    "signer": "0x41AeC2Aa38117fCAd7514D2E6c69FbB9fbfc2C20",
    "userId": "386827046"
  }
}