{
  "manageEntity": {
    "action": "Save",
    "entityId": "1579947386",
    "entityType": "Track",
    "nonce": "0x6f54875505e9929bdbd770bc7d4856912022f44f72149bd2bdac8812c4e191af",
    "signature": "0x165ae7fb2b4ab05c041fc21f62b23f628be3b1d3d36b2a94c5757d97972d3c22513d8ae32201ecb9457fdfcc1dcd3dc71362a976271d2635a5dfadc432a4894e1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}