{
  "manageEntity": {
    "action": "Save",
    "entityId": "1735633867",
    "entityType": "Track",
    "nonce": "0x340bc75f0ed0c09d377f8bdeeee591155a90f5c730260cd61446bf174cf3e584",
    "signature": "0x9f2baf4a2ba033b37672ebc1d9f12211a6e3b964423fec1f82afa1cfa95c0b496f3c38951b1cd44d41cb895d064bc65d8e41ad4861a69c37dc29fb23da4cedc61b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}