{
  "manageEntity": {
    "action": "Save",
    "entityId": "564861",
    "entityType": "Track",
    "nonce": "0xd951e74cde7d797746001cf1577fd7b8c7c376ddcd1ed89f23beecfa45ef2037",
    "signature": "0x0cc04583ebefaa9b6ee2caf63637f97af4f5054f28a46ead7fd992b18e74adc630d63c9926b958643c2af5aebb3919048b0fe06ce50dd103061505a9548b145b1b",
    "signer": "0x4596Af3c2C6431486ddFC282464aFfA4d54a3845",
    "userId": "10241"
  }
}