{
  "manageEntity": {
    "action": "Save",
    "entityId": "1753189182",
    "entityType": "Track",
    "nonce": "0x8e203ebd1f5855e2978b36c4b4b1a7f481e8312195de15f378702252f8439d0f",
    "signature": "0x9225117296315053b8a61d892bbe6e73176194134261a99a5a0651b5c63f090d5f05bb98e3e518cd676277720813c6943ba1c2a9aeb5921c1efb9911e85876a31c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}