{
  "manageEntity": {
    "action": "Save",
    "entityId": "585513",
    "entityType": "Track",
    "nonce": "0x077708a2c7b6893e9760d5d77d530810ce445e96bda3c8aab2ce4457a259b76f",
    "signature": "0x435c47fedfe64548a248518623dff26cc976655c84e29db4950c3b550a7382e50d7bf30e634ba0f9f072e198f4d5df6a09e6251e36f0d58cac543462e9cf1f1a1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}