{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c030365d654d3d04c5c1eb9c595c31f4976a800839c42503f1e81dc38b63f60",
    "signature": "0x8872ee2afe6c17b4067d1073dbe720713d2cc3f605f8201416dd77d2f8bcb13058c2ebd11d456ebaa39c059a81296be02ee98819d6e0fdb132b2bb346204a2321b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}