{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x76acdc33dd362f84b39aab14d9b07ce7979d6e995b9fc6463629e9ecdf8ec70b",
    "signature": "0xd23fe86980da937d6b010fc303b8918023c5077066da167d53df1dab4fb2aacb0653b8c5c3f6339dbcd7b3e079ef6fa0377723a59985d189c5750dfdd63e00571c",
    "signer": "0x7BEea252ee71B9e1a6cFE2be4E559C4F180632e8",
    "userId": "466002242"
  }
}