{
  "manageEntity": {
    "action": "Save",
    "entityId": "143312508",
    "entityType": "Track",
    "nonce": "0x86c8126213294d27f9479c1182e30c18dd0467f2beced68ba341de1bcdd85528",
    "signature": "0x46e8bb7b578d79a871d620d96beb7f90a5e343f9178106cc8068c8d805fea69f7870493a8d6c70017d7ee8c7b220ea503ab000d540809642b6009d54762cffde1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}