{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629677202",
    "entityType": "Track",
    "nonce": "0xe0d87b7ee633f09db182ccd31450e610458838bb8f52b8bf44ef05bff44f9447",
    "signature": "0xe0ab133c1b8fd11a7e1cc685f3f6078844a61fb7de820c67c7a83227fafc4420781b4b4e31b0bc4e8e78f00901f263bb03831afbb867bb396c96734f41372eca1b",
    "signer": "0xC7f1C5c105933bBdAC0c8A3219204f23AD4f3320",
    "userId": "381638009"
  }
}