{
  "manageEntity": {
    "action": "Save",
    "entityId": "969921659",
    "entityType": "Track",
    "nonce": "0xae0a70646149936b1e74d1ce65a099814e3dea51dfd7065ac0976a6ca2041688",
    "signature": "0x1d54339dfd6bcd970c3ddfb7d66434909d52318cc379562c87381227f20088c00f1e62c1953f855164cd60efd4b75b2c023ac63057c7bea99847bdefd5bfa1571c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}