{
  "manageEntity": {
    "action": "Save",
    "entityId": "271523",
    "entityType": "Track",
    "nonce": "0xbeff1346c7c24f4a6dce815817cc7308c94530f16089e212854ea492dc667a11",
    "signature": "0xf34f77337df431021918a1a6d0c20542ae6b16d9ab332bb8e4665c7b6c4598590015ad60e1b23b4ecf9f704741ac03e2c5a6315b08fab3d4827a6676dc17a2b71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}