{
  "manageEntity": {
    "action": "Save",
    "entityId": "468701459",
    "entityType": "Track",
    "nonce": "0xae8cf694c8a64d9935d34aa28f5f6143d68e6304f7150e4c40567b90de065230",
    "signature": "0xdf9895cc1d0103c05f29640258460a374ded99fb6930175bf275cf9cc4a8c03410a65c741d67e7e8b9443743612b5aad098f8961d3e20adbdeac3d4a66848e4d1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}