{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016363844",
    "entityType": "Track",
    "nonce": "0xd1c3e2d7f2b12714265ffe95f59dc1dd51ed6c0bd4d5993bf7b6d0b8bdd0fe5c",
    "signature": "0x8db46b75e49ad2f65da1e716303c89fb047aeaf8bc954ba7a77c29493fabeef94885a09d90e5a4ad6ec2f3aedf23c2bb1fce2e0e71e23a9ab8b7496fdf88bc9a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}