{
  "manageEntity": {
    "action": "Save",
    "entityId": "1486626307",
    "entityType": "Track",
    "nonce": "0x2ab087c3988286aba340b2476d89c64ed3be0594184933ad9633bc289c4343ae",
    "signature": "0x490ce79b83c7f200c26d84f2bee6175b7947ebf343764bbdf1464fcfd1cceede071dd504f5db8ec7a990a6cfb341f469b21405ffc9658507d0f48f1957f751471c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}