{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8545e0fa687123acb27b4644802294fe5df7041b70e274b33e6a0fcf669b6e13",
    "signature": "0x75358fa4b15151f67df11e29819a4740f1a8a4b23ae2dbed12dc6f9175b80fd90335ced09f33d84a7f4113a6ab6e4128611700c908cd651dc74141d51c577abc1b",
    "signer": "0x680Cf34238296b9341c2e109b163Ac0a17c8d938",
    "userId": "513706473"
  }
}