{
  "manageEntity": {
    "action": "Save",
    "entityId": "654226729",
    "entityType": "Track",
    "nonce": "0x741e815b30ef1190b3e7ff3852c2949ddf72bb9e0bd9d2c0b5987ac1e8054ff3",
    "signature": "0xe57061e2b1a77d48a7398b0fa1ba8288c109b56cbc0afbd8399c5c7814c6b992233e3e3fa609e673512b49713fd5d5be4082feaf98de943728c004014b04c7991c",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}