{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370103944",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x437fe4c4cec6facba373c27ef2b385c3d281fd584c7d88864b1d892a3b9a5b34",
    "signature": "0x46f4845d9c5dba3b7922b5e5bd03ea9925d4511c443c6230dee9209eebfd31dc6cfb2c2ec57aa8181f726e52a399a84d7ec0bc616452aebea50a66108c4d126f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}