{
  "manageEntity": {
    "action": "Save",
    "entityId": "702197",
    "entityType": "Track",
    "nonce": "0x711ee435e37776b12166ab6f24b5ccbfe488eaff1c18e510208911e18ca086ca",
    "signature": "0x09ec1da15e72c4ca1467a392856e969ff18ecdc939386a950cadfcc55729840031d4d66b2ba299408fb04b6cdb611bd661cf5f95d7a01aa3d6045ade89d770771c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}