{
  "manageEntity": {
    "action": "Save",
    "entityId": "1004953",
    "entityType": "Track",
    "nonce": "0xe8d70ff9f54e96443c3b8c5a88a47ee67f01d74d6119338bdcf37a014490a555",
    "signature": "0x511efb206806dd624060f7b731e9e16026b97455048aa2ef3ba43175c1865cfe2c60459c285ce7c3bb82f2ef82fc2b1e65fd85c98997a6e99c06f74042dfab721b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}