{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896604966",
    "entityType": "Track",
    "nonce": "0xe0aa542f657d803fc6b13abac8857e58bbcd2f7c3f649c92ac19512e5034d36b",
    "signature": "0x1b02f10af0d69b8f7b69cd308a7baa340bec5783a3f5667673f1e3546d18c4255ac990df9949bee1de9f41308f2e06bc9c9edc39a5074aa2e86f519080fb68381c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}