{
  "manageEntity": {
    "action": "Save",
    "entityId": "756452288",
    "entityType": "Track",
    "nonce": "0x0bd2986194edabdc22727fd9d467b3276ee91cc6b7344bd7da655c6ad6870611",
    "signature": "0x39560affd18c5d0ea68cdf90097a18d80cb1f3b741161539388808b92e415e6250703f0e8839535f661fb80aef29cca325e40193214b2644714f3f513a0337751c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}