{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x91b9366cb894e3b33378daa5f5efd1bda11cb3309e432dcb9ab408d1b3edc259",
    "signature": "0xb2aceb31a5f777b2f99d8eb31eee1c48cb976a38067ddbf4d8ccad1be1cd5eb01f2e284ab4f36e62082362d7c157628fb315d443e58d35f8fdc77b103b458a0d1c",
    "signer": "0xf7Aa544bb3B895424fDD1bF0b8D1922AC9488Fba",
    "userId": "812778388"
  }
}