{
  "manageEntity": {
    "action": "Save",
    "entityId": "673713498",
    "entityType": "Track",
    "nonce": "0xb01c706140c5d4dce802cdc63ba15c1a0cfa0bb77a97aa8deadcbc0f845dd20f",
    "signature": "0xceff230b9e2db06491bbd36152291dd3022308bf38f812e5055e9be6d0cc3ed20da167745dd4d5248bafda20f3ba62680eb708ee9de768c369da43141c9e9c2c1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}