{
  "manageEntity": {
    "action": "Save",
    "entityId": "383917876",
    "entityType": "Track",
    "nonce": "0x8937686ef3f10f43ef434b576c4ca41822cac7538771148574c11038ab13f778",
    "signature": "0xf85a9eead5ae4eb6dd34e6b527dd5f8e9ae8fb43c641ccd83efad811224472786a5890dafc235b2e4a17a479b17b726610f14c795c125f2a8abd86552fd29b1c1b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}