{
  "manageEntity": {
    "action": "Save",
    "entityId": "1737460136",
    "entityType": "Track",
    "nonce": "0x8c983e425302ec3bdbe8e45357fda2497736e3fe54e2414e7b43b2c2d779f373",
    "signature": "0xfc5c7ead69b632695ac0420ec3b5bc94c9613365076e67c1ebe9233d73636c375fbad85341293f5335e4fa330de3eb917387f5989d0acde554d63a8dc78056d71b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}