{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x96310c87d9d0fff2950b181e926a79fd3f67b90293cb233e9449c6acba8e21ac",
    "signature": "0xe175afe89949351c4cf13e2d8c80e3b0468cf251b765bbcf3c5bfef6aac9b9c636540201d25473a49d600acd40a48c2a6169f0a0f817d3da3b0884a37e8c6d781c",
    "signer": "0xFfa6D9d31fde82a11b813113Bf6508f95D22dcc2",
    "userId": "48292657"
  }
}