{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938265723",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd847b43216a2efdcc0a8770a29aed9c58b9ce2e4858779dd8182801bc70c9e70",
    "signature": "0x7eba37a08a76ab9a0293d7f628ac9786bc13640525ad3e3eccbec3119a55de7f1f09240405692c9237bd6da16c33630d1642e1444363fdda11ee008c7ed024511b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}