{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x01b0255da09e6fa3d3ced23d0d97b5b3b96908e702589e604e0b4e89d39bcdf7",
    "signature": "0xd9a2e1dce4c94b6721295e074a0db3e283b9c46078311f8c1e17ef13c5e3cbbb7022e8eecf785d9417607b5a20a82e4c96a245fd0371eb44234e03c97baed7861c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}