{
  "manageEntity": {
    "action": "Save",
    "entityId": "398506",
    "entityType": "Track",
    "nonce": "0xfab2c8d450ed5249a3755105d7a28bf4c3fb69374adf149dbe5c9bc14274c9fa",
    "signature": "0xc2ddcbe1eb55e7a4132d744feca7d183b0cad405e9518a2da522bb3cfabf9bf45f0607ca831e2b41c560b7032ba181326907ed1f21fe7d99697d1b13761c4aca1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}