{
  "manageEntity": {
    "action": "Save",
    "entityId": "618379605",
    "entityType": "Track",
    "nonce": "0x3dbaa140940c9f63a636edd2266cb71b6030a2abce8a47d564424ea08207aa26",
    "signature": "0x277d188ad73f6d8ccb1c5f3e2bc028e9e4352687952cc0827fa51c3443dd98564f2ea742c2cff4c621357117fb2dc133644d6874974250764d0c3d4449d087431c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}