{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x50ab5618dfca082cf9c3c013b7286b96c09cda203ca92d1ff077ff927e600807",
    "signature": "0xc1c5c0a1ef9dba5a79463925f0392dcb36719f95d1b35d9e36caeecc591f79b13ebc9f5b1e338e8cfaba5e615ad07b9401453bb4d1de053a8c01efdb74f8f8701c",
    "signer": "0xdAaDca0d5fbaf7232D7865F69601e241da465e01",
    "userId": "840867370"
  }
}