{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678888700",
    "entityType": "Track",
    "nonce": "0x8b6e57edfce330780d243fa0b93950b503bf1de0325ec3b0a4b22befda9910de",
    "signature": "0x360e768fc7c2922ff1f3b8985d84237afe455aab499cc3e796c3af47ccc0f73e476da64633995f519dfb987586fed863c67febe63cfa34101fe1e9fd3b8648271b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}