{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x80f82c7ee53afa7ec0182479093dd7274b86c0d05731568e4c099449c9ff7c18",
    "signature": "0xb8b5c8c8d028691cabf5f2d80f0e6841c7373f5b83cca1851737c721c134052c1f643a209a2236ca83a60e75816ae1c20ed1aefc7e68c0be95a80c9f6e43ca261b",
    "signer": "0xa9C1a2BDeD896d3f122E366aB647BF1C74C00eBA",
    "userId": "209707164"
  }
}