{
  "manageEntity": {
    "action": "Save",
    "entityId": "409954",
    "entityType": "Track",
    "nonce": "0x5ea80d17c08d177e90b5d954cdf100209836e89ba7f185f3862afd6255f213f0",
    "signature": "0x655d4140d7a433949f39e58d9029aff1db518ec6a96603f5a2953ecc913ca8c0648d315d6c49388bad9364348a668ef6000290a4203c8ef0cad524ea65d6310f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}