{
  "manageEntity": {
    "action": "Save",
    "entityId": "265863413",
    "entityType": "Track",
    "nonce": "0x4c3fdf4b3ace6af533348dfab8ba4666e5e5c35308c079b49a84adecb94f2d06",
    "signature": "0x8aece8c8a5b2e173ec89d7cd97fd41459bc2de5aeb0be365316d1760cc578fa87963e7cc7cab9e5f1f4c38ec333a3986adcf54c7cad079a4bb1db6537cdae2541c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}