{
  "manageEntity": {
    "action": "Save",
    "entityId": "766519",
    "entityType": "Track",
    "nonce": "0xa133d86fba9264a3223bd5d3c7689e2fd41e30d48a5f1bb87b0afa94aee7397d",
    "signature": "0x9f76cc2bd78a58c5f857ce373470d14d66244d2c504ce270708fd583b7a3531550482242ebf8c7a9df2ab03f4bcd675d9bfa5e7454166ebf8b53db6eab855fca1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}