{
  "manageEntity": {
    "action": "Save",
    "entityId": "250114",
    "entityType": "Track",
    "nonce": "0xa1829a56eaecf7548a3fb23abc2da0e031637954ce0de388d0f034dc5be6af9b",
    "signature": "0x20385b4e09ab6f18ae757afdc573c0298091f58bea92f80b15f89948e62fd4293bc9ca59250131de06cac2d25660f59967942aa10cad2ba53b829bd7cf0ed91f1b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}