{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x553020f1ccf224d3a066c691cc7cc44310f4030ece2bf6b88eb487a28cf79ef4",
    "signature": "0xdb8a68c65a6e211d409708d75f127f6240c59c7d5c18c166cd24b8a17ce53bcb2d99d3bf06bf5c5dc36187ee971b9a330f110b602a88dc95a9f3738d94155da51c",
    "signer": "0x4De48fE1b56fD037B5cb86AB17ca457Db6a575eD",
    "userId": "60008468"
  }
}