{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416876644",
    "entityType": "Track",
    "nonce": "0x3fc1e1aeb0bfc9e77cc7e21a4fff6d566ddbf0c4afc68e3958ea684e490247e8",
    "signature": "0x6bfc0f48e916d9906087289793af11e425cddc1cef83efd05f440b6861a1ec9d70360f742ca77f6ba864f1bb4b90ce9217d5e84437bc3602c5676392c65fef071c",
    "signer": "0xE6a2533061175ED4c7f073A7BE3dc4189A4DE47E",
    "userId": "427249190"
  }
}