{
  "manageEntity": {
    "action": "Save",
    "entityId": "1223366762",
    "entityType": "Track",
    "nonce": "0x7498e6ef5f59ec3eb69b25c60dbaacd03db347daf0a6c4c0d599a933264b3113",
    "signature": "0xb381df3dc2a43d6b805714e12ef1642a75142bd97a3daf6dbdd8ac974bce7a4f486c8b0ac5f6dee76392ea558cb331352ebc87cd63c8b34cf06ecf554b8ebf541b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}