{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304671992",
    "entityType": "Track",
    "nonce": "0x8413934fcb716a846a4a31059c75b8e68f8e920b48dfbda1c7743887380258b7",
    "signature": "0xdc937605b8dce225595a000b13da60b1689d46bcdef3af6d79f66628a6b402d91c02c2598edb1b539a287ab30a217b5195ff7d58dd399792fe42aa10481e61411c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}