{
  "manageEntity": {
    "action": "Save",
    "entityId": "558249234",
    "entityType": "Track",
    "nonce": "0x1bda5cc73276d1a4756d76d28c50187186116172043d2d60e8afd090ec6c33d6",
    "signature": "0x667f888684e5ef67c9fcc9e5c98f3e3033b0e77c09354a6b1a366337837d1ee46bb7da1458f5f5a2bb030dc9f965dcbc4e53b30e9777cb317766875dc74f5bb71c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}