{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf667c06b1a1abdcccf6c226158db7414cea52bd21afb4fc1373e119d9e79b819",
    "signature": "0xa80ed8bf121b8d39d577cedde3f04404190bc535f85080b1dd72ba4d8241d2df427d5f6c120ccdefe464404c7e16109ea2e304752765bea86638ba978cfb44861c",
    "signer": "0xa4be019Fc4b3b5D426BFb036faAF389D8e9eec6e",
    "userId": "958873816"
  }
}