{
  "manageEntity": {
    "action": "Save",
    "entityId": "343815",
    "entityType": "Track",
    "nonce": "0x0af0089db678319a573a4ed199389ebc62e2df8065b9df298fc0975df4e857c7",
    "signature": "0x8b3d57f39ddcf7454d88b4be7834573ac7b2957b7ee618dee5e15346394207ec40115a0986dc37e0e978dd2df223da4d88beeaa52459c93fddea9186dd687e321c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}