{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220183781",
    "entityType": "Track",
    "nonce": "0x8156abb33857ffa2b60ff748ecbd114be2cdffe0a37c80ec69ea9e7b88a411b0",
    "signature": "0xaa3aa075696d5aae6a18a5ebab4927937c43e050f84a6c46fe4a3f86c90d446045eaca255a6fb7a4639b33f18b7ab8f83e65ada5b60c3d7459790f84fe4434311b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}