{
  "manageEntity": {
    "action": "Save",
    "entityId": "1147753459",
    "entityType": "Track",
    "nonce": "0xa51a40106c8b9a22ecea9489d5a10bd7676f139842c3ecd88b035930a7c5b21f",
    "signature": "0x51563bbebe578ec6e7bd328a293a27f157e5466fb98a8a1b9163dfbec53c3dd946265b797c6bac62767d8e36e3bd9e459a4770caa497c8775b4bddfe037aefa81c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}