{
  "manageEntity": {
    "action": "Save",
    "entityId": "1542156335",
    "entityType": "Track",
    "nonce": "0xf8c13dede0635019a10c870ae20ebf23269cf36d131f7ab3b76f417c5ec51cf5",
    "signature": "0xf286a1d6809c5c1c23443fd33bbe26d4d6019af65008c6ff28faaa16045ce8bb4b30fefbf9a21246f7e8b9c1144ad709a8c949f234a8a64b7ae3a4ea8415e4c71c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}