{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1e13c90369f58605cd47dc034d0849d84cdbdb1151988767ec8260ea0c8e0436",
    "signature": "0xb94e6aa8f2ce8507c36148aa5eac70d7c333121f29a775366e1a212922027df975a8cd116f1d0d112b80bfcc8a26f43f8917d12476331ab22ad98f1f718e0c831c",
    "signer": "0xE38b2EE55025fE4a187bd709bCA4f4a4AB94521D",
    "userId": "895414211"
  }
}