{
  "manageEntity": {
    "action": "Save",
    "entityId": "954472",
    "entityType": "Track",
    "nonce": "0xe82b9fde0e5ed703193ca423b3b2a7baf16095aec4607a9527f34cc78bd593cb",
    "signature": "0x4815c712dd842c4028ce3819fbe03acfd2afcd48aa579dfcff9a33454d1aa0fd49ddd8c08736c376201be6ddd40fbe4cee6d869a04b559b55dc10f42980f6d591b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}