{
  "manageEntity": {
    "action": "Save",
    "entityId": "385321094",
    "entityType": "Track",
    "nonce": "0xd4dd64ba346c876d00c2590a47699c06193379a08f7cdaca01f7fe38b8f8fdb8",
    "signature": "0xf3c39241c385449a4da16c3021f3e8f427a1a4bb48188838ed8f8e76e22123d57a62f157c4a4722e5a316d4e11c5a80251bcfe196374ba3689e7c3d3b8cb28201b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}