{
  "manageEntity": {
    "action": "Save",
    "entityId": "593429",
    "entityType": "Track",
    "nonce": "0x5b856de71e9d54bf688f94153b502d00a7cbdbe86753184354e3041698901d0f",
    "signature": "0x479429e037992681143c49c01c0a2f54aaded41b8cf732b098bd5e88ae8d25d5430e3b1ee6c98e9f65934b43660b545119e144155ac8f72db501f39347e29f701c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}