{
  "manageEntity": {
    "action": "Save",
    "entityId": "707495238",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x284c91b037e38407eebcbd7cc71bc35ff228a10502ad616d180f86dc6a4ffda5",
    "signature": "0x887dedefa26cd7c76c03a1ba6f812f9083f5b4e8cf99ecd0521ad9c901f1a9af0a288693ba4005388bb9c75774173b60324af10b81ed5214591931cb81c3b6cf1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}