{
  "manageEntity": {
    "action": "Save",
    "entityId": "323556",
    "entityType": "Track",
    "nonce": "0xcb6ba3ecdc2c57d342e307fbc8efbc25309c158f0cc0d0b6a060d79ef6239bc2",
    "signature": "0xa2888a59b8e10d017d5a46e77432056529ad52277e81becd33263552a178f47450bb154c5e4954def4fcf99cd92f6e28ca73ead10a62bd10919dd950d52f58201b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}