{
  "manageEntity": {
    "action": "Save",
    "entityId": "123014",
    "entityType": "Track",
    "nonce": "0xab72da176712337ccd4cc4c01fa587d285bec2504206c1f4bf12b8f218859725",
    "signature": "0xf854b4bd464fab2f8b67922aa39ee7d2bd72f332e9b6e512ed22d58e4442626c150b2e81a014b09558d17bb4fc62f2f8022c64a5205000bc7ee15bcc18bce9401b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}