{
  "manageEntity": {
    "action": "Save",
    "entityId": "671396651",
    "entityType": "Track",
    "nonce": "0x4716554428b5e7a3d165f06d39bb61fc4b3d4e878cf1f32ce8a08f06f6ebb1e5",
    "signature": "0x295d203fe2e168490bdd458b858bfc520f19d1b7743ca21003d274b678fcff597f69c3a91bf94fab7e8f8d001d44decc66d1d73162f02227b95dbac58b309ff51b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}