{
  "manageEntity": {
    "action": "Save",
    "entityId": "622386027",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x76bf5c639ed6a9e7b3e0b0539b962da07ae1cdbf9f83196f6af9b2e72be98f38",
    "signature": "0x1d3ff8be0374e52685b9dfa57ce1cf876dd6f37e0e82371c201fdd6240a5ec700d24d9479e05b24c1ac161c3d3a96a4b9da146025ce79538876ddd7542c638771b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}