{
  "manageEntity": {
    "action": "Save",
    "entityId": "1396407689",
    "entityType": "Track",
    "nonce": "0x873241ad8f06274e45a4a865cb3d1a10cec567700a82863c45d04e7c6f0b276a",
    "signature": "0x191c322061b85446f31a024e6c4ef6befe35f8453900838a71260a1ab5fe158d1ae532011284995642f663e91cdacf229171989d23c926783781699a90ecdd541b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}