{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040734",
    "entityType": "Track",
    "nonce": "0x7f34e98b134daf6c871e8580bcd4823a477ec5bdcc8d058c193bac217f9afe2f",
    "signature": "0x77450b89f08e5984d83c42cecf2ac28b239dd7dc7cabf40f0fda0e640332e0a146b0a14eb551224f27f937cb256d1228a3c3fe706d1cb849c504dc9864b0c1f81c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}