{
  "manageEntity": {
    "action": "Save",
    "entityId": "690214937",
    "entityType": "Track",
    "nonce": "0x614e6c3abe405bb2c2227501b784d68f5dc4ef9f86111d1dbe8c56edf38ff379",
    "signature": "0x55ea31dbcf94df50c31b5fa9b6dbfa7d5be0ffe3daedb809049853e422832d3d659c6f2548228d62c979cffdfa1ffc552e88712eb6165f5715108319be0caba01c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}