{
  "manageEntity": {
    "action": "Save",
    "entityId": "399588009",
    "entityType": "Track",
    "nonce": "0xd2e402486dd364ef4a032a66f85e2cdc624bbe686bf0872a00315384fc7d6207",
    "signature": "0x73b88e2df0bdd647081c99548e434e113d889ada55adeac8e979a46415ee2c7779bb7a32fec595a9b3879bb5084617acb6c7797e419140f023d59d1ba268f98f1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}