{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x257be37d02238a43ab60da68584f337b5f21226f81797580da3181fd838223f6",
    "signature": "0xe1377e6871a9109ef77f6528f45e2f71dbd835b35852ec43ac9185d2426a60aa5f3ce6d31d8c6441f0c0e9afd9e934c995d1b3530f2ced10abaaccec5020ac331b",
    "signer": "0x69163Aed5B32EC7f6C8a1e4aDEd7fD7E298F9521",
    "userId": "508931608"
  }
}