{
  "manageEntity": {
    "action": "Save",
    "entityId": "1446812091",
    "entityType": "Track",
    "nonce": "0x5901ded2cda186935d486f9c090f3e274b2413e12c37a29d837503cc472a4fd1",
    "signature": "0x5058bf67c3d40e4cdd1f3fbdcb2fa40f78e3fec005943c45f1f9c77a6021d9653c67e280bf07f313834d6d1f463d92b6474a80992a4e13e7e56d9d975d24af541b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}