{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa890f624b3f3baacc2443e090083afba6a4d87267b6235765a1be47d2cb4ff6e",
    "signature": "0x06d525f3aa9ee7886214dd1f083368b5213751ac7d70596074e705513bc9ccfb3ad5ee835371a273d6a6f5a8329459d84a4ff784cf05cb52e7969b17944dcc8e1b",
    "signer": "0x84D0f77A9C8f8fa0D9D5A2bCBcbA8a2b4c43F63a",
    "userId": "732135719"
  }
}