{
  "manageEntity": {
    "action": "Save",
    "entityId": "680403201",
    "entityType": "Track",
    "nonce": "0x1726f0ab43606695acac3d0b59abd369664413b3dc9371ab81908e1a6a40549e",
    "signature": "0x12b54a34e3f01fe656b2af6aa84bcc62d754cfce7c630bd0114d20587eefd71265d67209dc18b5cd09f35408c75f835cc9bb41c8327a87e8873368d03a59c8221c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}