{
  "manageEntity": {
    "action": "Save",
    "entityId": "1323287611",
    "entityType": "Track",
    "nonce": "0x2702df1d5102836121cb4d5fb51cbc652dd4566643184745328b6e2864ccd366",
    "signature": "0x34f9b9b4d121de54b149cdaf7afc0753404186bac99214b9e7771afdb39cc2c02c63c3358963dbfd2d8b0519886b070785c58d9146f20dab3ccf2909e3fb61d11c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}