{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886097223",
    "entityType": "Track",
    "nonce": "0xac6c10770bb35d1ce590c30ccf872c54020d71332cd2f8ac82ba6169607c4a24",
    "signature": "0x6abca52543165b057fc28f780201c59fef9fd5f38f087c3d6c598caf9c1255764b6ae6d066ccee5b6aebe3c87de58ce5c1b4d6cbe2dde7ebbb1dd2cdb8c104751b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}