{
  "manageEntity": {
    "action": "Save",
    "entityId": "208226",
    "entityType": "Track",
    "nonce": "0x5e476285875a4dda35e482ba8766a452b2100bd38b7023aca787aec70d9bd506",
    "signature": "0xd190e0358b983cafe717ccc48aa2edaed03a08b4afecf8a522ae5748c328d21254ad7d23c5994dddb987936d95d463315d28ff551e44222d6493f4d238d004841c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}